Murder, Manslaughter & Vehicular Homicide: What Must Be Proven?

JADED EVIDENCE • UNDERSTANDING THE LAW

Murder or manslaughter: what must the prosecution prove?

A death, a criminal charge and a proven offense are different things. The verdict depends on the applicable law and evidence establishing each required element.

Research reviewed October 30–31, 2026 • All 50 states • Educational overview of selected core offenses

1. The categories: a starting point, not a national formula

First-degree murder

Often involves deliberate, premeditated killing, but statutes may also include felony murder or other specified circumstances. Some states use a very different first-degree definition.

Second-degree murder

Often includes other murder, potentially intentional or based on a legally defined extreme disregard for life. In some states this label instead identifies felony murder or mitigated intentional murder.

Voluntary manslaughter

Commonly involves an otherwise-murder killing reduced by legally adequate provocation, heat of passion or another recognized mitigation. It can involve intentional killing; it is not synonymous with an accident.

Involuntary manslaughter

Commonly concerns an unintended death caused by the required reckless, grossly negligent or qualifying unlawful conduct. Some states instead use reckless homicide or criminally negligent homicide.

Vehicular homicide / manslaughter

Requires the particular statute’s driving, culpability or impairment conditions and causal connection to death. Some states have several traffic-homicide offenses with different elements.

Felony murder

A statutory murder theory tied to a qualifying felony and a death. It may not require a separate intent to kill, but the predicate crime, participation, causation and any additional statutory conditions still matter.

These are comparative descriptions. The state sections below explain important departures. Federal §§1111–1112 provide another framework, applicable within their federal jurisdiction; they do not replace state law. ^[4]

2. What must be proven beyond a reasonable doubt?

An element is a legal requirement; evidence is what may establish it. The prosecution must prove each required element of the submitted offense. It does not have to prove every alternative definition appearing in the statute, nor does each individual item of evidence become a separate offense element. ^[1]

Infographic · From an allegation to a supported verdict

Death and identity: Did a person die, and has the prosecution established the defendant’s legally relevant responsibility?
Act, omission or participation: What conduct is alleged? An omission theory may require a legal duty; accomplice liability has its own conditions.
Causation: Did the alleged conduct cause death under the applicable legal test?
Required mental state: Was the required intent, knowledge, recklessness, negligence or other culpability established?
Additional charge-specific facts: Such as premeditation, a qualifying felony, a protected-victim circumstance, impairment or a driving violation.
Applicable defense instructions: Apply the judge’s directions about justification, mitigation and the burdens assigned to each issue.

A reading checklist, not a substitute jury instruction. Different statutory routes require different combinations. ^[5] ^[6]

Reasonable doubt can arise from evidence or missing evidence. It is not a purely speculative doubt, and the standard does not require elimination of every imaginable possibility. The exact instruction varies by jurisdiction. ^[3]

Follow the court’s formulation rather than assigning a percentage. The Supreme Court has explained that no single set of words is constitutionally required, but the instructions as a whole must correctly convey the prosecution’s burden. ^[2]

The defendant does not have to prove innocence or supply an alternative explanation to defeat an unproven element. If an essential element remains unproven beyond reasonable doubt, that charge cannot support a guilty verdict. ^[1]

3. What do the mental-state words mean?

Intent to act is different from intent to kill. A person may deliberately perform an act without intending its fatal result. Depending on the jurisdiction and facts, the law may still recognize murder, manslaughter, another offense or no criminal homicide.

Purpose / intent: generally concerns a conscious objective, but the particular statute specifies the relevant conduct or result.
Knowledge: concerns the required awareness of conduct, circumstances or consequences.
Recklessness: commonly involves consciously disregarding a substantial, unjustifiable risk.
Criminal negligence: commonly involves failing to perceive a substantial, unjustifiable risk with the required serious deviation from reasonable care.
Malice / extreme indifference: legal standards that can allow murder liability without a separate purpose to kill; they are not clinical diagnoses.

These are orientation terms. State definitions control: Kentucky, for example, uses “wanton” and “reckless” differently from the terminology used in many other codes. See its state panel.

4. Evidence answers different legal questions

Medical, autopsy and reconstruction evidence: may address injury, mechanism and causation. It does not independently determine criminal intent or the offense degree.
Statements, messages, conduct and surrounding circumstances: may support or challenge an inference of the required mental state. Their weight belongs to the factfinder.
Timing and preparation: may matter to a premeditation theory, but planning is not an element of every murder route.
Toxicology and driving evidence: may address impairment, conduct and causation; the statute determines which are required.

Do not turn an inference into an automatic rule. A severe injury, absence of external bleeding, weapon use, intoxication or a claimed accident must be evaluated against the actual elements and the complete evidence.

Motive is not the same as intent. Motive asks why; intent concerns the mental state required by law. A specific statutory purpose or circumstance may be an element, but a persuasive story about motive does not replace proof.

5. Defenses, mitigation and lesser offenses

Justification can make conduct lawful. Mitigation can reduce an otherwise more serious homicide. Insanity/criminal responsibility is a separate legal inquiry. The rules and burden allocation are not interchangeable.

Some issues must first be supported by evidence before the judge submits them. Some require the prosecution to disprove them; some affirmative defenses or mitigation issues carry a defendant’s burden. Read the state-specific instruction rather than assuming a national rule.

Massachusetts: when the applicable mitigating circumstance is properly at issue, the murder instructions address the Commonwealth’s burden to prove its absence.
Illinois: the State proves first-degree murder elements beyond reasonable doubt, while the defendant bears a preponderance burden on specified second-degree mitigation.
Texas: sudden passion is a punishment-stage murder issue, not a separate voluntary-manslaughter offense.

Each example is linked to its law in the state section below. “Preponderance” generally asks whether the proposition is more likely true than not; it is a different standard from proof beyond reasonable doubt.

A lesser offense is not automatically a compromise verdict. The judge decides which lesser offenses the law and evidence permit, and instructs the jury on their elements and the order of consideration. The jury must follow those instructions. ^[6]

6. Choose a state

Open any state below. Each panel maps the major labels, selected core culpability requirements, vehicle-related offenses and the main proof issues. Links lead to statutes or instructions; reproduced statutory texts are labeled. These are concise roadmaps, not exhaustive lists of every child-abuse, drug-delivery, fetal-homicide or other specialized route.

Alabama — View more

Murder categories and core requirements: Murder includes intentional killing, extreme-indifference recklessness and specified felony-murder routes. Capital murder requires additional statutory circumstances; there is no ordinary first-/second-degree murder pair.
Voluntary / mitigated homicide: Manslaughter includes reckless killing and murder mitigated by legally recognized heat-of-passion provocation.
Involuntary / reckless / negligent homicide: Criminally negligent homicide requires death caused by criminal negligence.
Vehicle-related deaths: Current §13A-6-3 also covers death caused by specified impaired-driving violations; do not rely on the older DUI classification in §13A-6-4.
What the proof must address: Identify the charged route and prove death, causation and its mental-state or predicate-offense elements. Capital circumstances require separate proof.

Read the law and instructions:

Core overview; alternative routes and specialized offenses are not exhaustive. Apply the version in force on the offense date and the instructions given in the case.

Alaska — View more

Murder categories and core requirements: First-degree murder includes an intent-to-kill route. Second-degree routes include specified serious-injury conduct, extreme indifference and felony murder.
Voluntary / mitigated homicide: Heat-of-passion mitigation is addressed in AS 11.41.115; manslaughter is not divided into voluntary/involuntary offenses.
Involuntary / reckless / negligent homicide: Manslaughter includes intentional, knowing or reckless killing not amounting to murder; criminally negligent homicide is separate.
Vehicle-related deaths: Vehicle-caused deaths may be prosecuted under the applicable general homicide statute; the vehicle alone does not determine the charge.
What the proof must address: Compare intent, knowledge, recklessness and criminal negligence, and apply the particular statutory alternative and any supported defense.

Read the law and instructions:

Core overview; alternative routes and specialized offenses are not exhaustive. Apply the version in force on the offense date and the instructions given in the case.

Arizona — View more

Murder categories and core requirements: First degree includes premeditated intentional/knowing killing and specified felony murder. Second degree covers listed intentional, knowing or extreme-indifference killings without premeditation.
Voluntary / mitigated homicide: Manslaughter includes second-degree murder committed on sudden quarrel/heat of passion resulting from adequate provocation.
Involuntary / reckless / negligent homicide: Reckless killing is another manslaughter route; criminal negligence causing death is negligent homicide.
Vehicle-related deaths: A driving death may fit a general homicide offense depending on culpability; there is no universal crash-equals-manslaughter rule.
What the proof must address: Prove the charged mental state, causation and, for the selected first-degree route, premeditation or the predicate-felony requirements.

Read the law and instructions:

Core overview; alternative routes and specialized offenses are not exhaustive. Apply the version in force on the offense date and the instructions given in the case.

Arkansas — View more

Murder categories and core requirements: Capital and first-degree murder have separate statutory routes. First degree includes purposeful killing; second degree includes knowing killing with extreme indifference or serious-injury-purpose killing.
Voluntary / mitigated homicide: Manslaughter includes otherwise-murder under extreme emotional disturbance with reasonable excuse.
Involuntary / reckless / negligent homicide: Manslaughter also includes reckless killing; negligent homicide is separate.
Vehicle-related deaths: Negligent-homicide provisions include vehicle-related alternatives involving intoxication or other specified conditions.
What the proof must address: Distinguish purposeful/knowing conduct, extreme indifference, recklessness and negligence. Check the particular subsection rather than treating all alternatives as cumulative.

Read the law and instructions:

Core overview; alternative routes and specialized offenses are not exhaustive. Apply the version in force on the offense date and the instructions given in the case.

California — View more

Murder categories and core requirements: Murder requires malice, express or implied. First degree includes deliberate/premeditated and other specified routes; other murder is second degree. Felony-murder liability has statutory limits.
Voluntary / mitigated homicide: Voluntary manslaughter includes heat of passion; imperfect self-defense is another recognized mitigating theory under the instructions.
Involuntary / reckless / negligent homicide: Involuntary manslaughter involves the required unlawful-act or criminal-negligence theory, without malice.
Vehicle-related deaths: Vehicular manslaughter has distinct provisions, including differing negligence standards; implied-malice driving can support murder when its elements are established.
What the proof must address: Distinguish intent to kill from conscious disregard for life. Prove the selected murder or manslaughter theory, causation and applicable absence-of-justification requirements.

Read the law and instructions:

Core overview; alternative routes and specialized offenses are not exhaustive. Apply the version in force on the offense date and the instructions given in the case.

Colorado — View more

Murder categories and core requirements: First degree includes intent after deliberation and specified other routes, including extreme indifference. Second degree includes knowing killing and the current felony-murder provision.
Voluntary / mitigated homicide: Heat-of-passion circumstances can affect second-degree murder classification; they are not a separate offense called voluntary manslaughter.
Involuntary / reckless / negligent homicide: Manslaughter includes recklessly causing death. Criminally negligent homicide requires criminal negligence.
Vehicle-related deaths: Vehicular homicide addresses reckless driving or DUI with the required causal connection; its alternatives differ.
What the proof must address: Identify deliberation, knowledge, recklessness or negligence for the charged route. Use enacted law: a proposed bill is not a statute.

Read the law and instructions:

2026 Criminal Code, §§18-3-102–106

Core overview; alternative routes and specialized offenses are not exhaustive. Apply the version in force on the offense date and the instructions given in the case.

Connecticut — View more

Murder categories and core requirements: Uses murder, murder with special circumstances and separate felony-/arson-murder provisions, rather than an ordinary first-/second-degree murder pair.
Voluntary / mitigated homicide: First-degree manslaughter includes an extreme-emotional-disturbance reduction and specified serious-injury-intent/extreme-indifference routes.
Involuntary / reckless / negligent homicide: Second-degree manslaughter includes reckless killing; criminally negligent homicide is separately defined.
Vehicle-related deaths: Second-degree manslaughter with a motor vehicle requires intoxication and death resulting from its effect. Other motor-vehicle homicide provisions have different negligence elements.
What the proof must address: Do not confuse manslaughter degrees with murder degrees. Prove the exact mental state, causal link and any special offense conditions.

Read the law and instructions:

Penal Code, §§53a-54a–58a; check current supplements

Core overview; alternative routes and specialized offenses are not exhaustive. Apply the version in force on the offense date and the instructions given in the case.

Delaware — View more

Murder categories and core requirements: First degree includes intentional killing and specified felony-related routes. Second degree includes cruel/depraved indifference and a felony-related criminal-negligence route.
Voluntary / mitigated homicide: Manslaughter includes intentional killing under extreme emotional disturbance and other listed circumstances.
Involuntary / reckless / negligent homicide: Reckless killing is manslaughter; criminal negligence causing death is criminally negligent homicide.
Vehicle-related deaths: Vehicular homicide has first-/second-degree provisions (§§630, 630A); negligence, impairment and the applicable statutory alternative matter.
What the proof must address: Match the culpability level to the particular offense. The felony’s existence alone does not replace the statute’s causation and culpability requirements.

Read the law and instructions:

Title 11, Chapter 5, homicide provisions

Core overview; alternative routes and specialized offenses are not exhaustive. Apply the version in force on the offense date and the instructions given in the case.

Florida — View more

Murder categories and core requirements: First degree includes premeditated murder and specified felony-murder routes. Second degree includes an imminently dangerous act showing a depraved mind without regard for life. Third degree is a separate felony-murder category.
Voluntary / mitigated homicide: §782.07 uses manslaughter by act, procurement or culpable negligence; voluntary/involuntary labels do not create the same statutory pair used elsewhere.
Involuntary / reckless / negligent homicide: No intent to cause death is required for the culpable-negligence route; the specific act-based instructions differ.
Vehicle-related deaths: Vehicular homicide requires reckless operation likely to cause death or great bodily harm and causation. DUI manslaughter is a separate provision in §316.193.
What the proof must address: Prove the charged route; do not assume all murder requires premeditation or all manslaughter requires an intent to kill.

Selected element checklists · Florida

First-degree premeditated murder: death, a criminal act causing it, and a premeditated killing. Felony murder is a different route.
Second-degree depraved-mind murder: death and causation, plus the required imminently dangerous conduct and depraved disregard for life.
Manslaughter: death caused by the charged intentional-act, procurement or culpable-negligence alternative. An intent to cause death is not required for manslaughter by act.
Vehicular homicide: death caused by the defendant’s vehicle operation, with the legally required dangerous recklessness.
DUI manslaughter: qualifying vehicle operation/control, the required impairment or alcohol condition, and operation causing or contributing to death.

Selected routes paraphrased from Instructions 7.2, 7.4, 7.7–7.9; this list does not reproduce their definitions, exclusions or all alternatives. Apply the instructions on justifiable/excusable homicide where required. Read the current Florida criminal instructions.

Read the law and instructions:

Core overview; alternative routes and specialized offenses are not exhaustive. Apply the version in force on the offense date and the instructions given in the case.

Georgia — View more

Murder categories and core requirements: Malice murder and felony murder are central categories. Statutory second-degree murder specifically involves death during second-degree cruelty to children; it is not a general unplanned-murder category.
Voluntary / mitigated homicide: Voluntary manslaughter requires the statutory sudden, violent passion arising from serious provocation sufficient to excite it in a reasonable person.
Involuntary / reckless / negligent homicide: Involuntary manslaughter concerns unintended death during a qualifying nonfelony unlawful act, or a lawful act performed unlawfully.
Vehicle-related deaths: Homicide by vehicle under §40-6-393 has distinct routes tied to the traffic offense and causation.
What the proof must address: For felony murder prove the qualifying felony and death connection; for malice murder prove malice. Select the correct vehicle subsection.

Read the law and instructions:

Core overview; alternative routes and specialized offenses are not exhaustive. Apply the version in force on the offense date and the instructions given in the case.

Hawaii — View more

Murder categories and core requirements: First degree requires intentional/knowing killing plus an enumerated circumstance, such as multiple victims or specified protected status. Second degree generally covers intentional/knowing killing outside first degree.
Voluntary / mitigated homicide: Extreme mental or emotional disturbance with a reasonable explanation is an affirmative mitigation reducing murder to manslaughter.
Involuntary / reckless / negligent homicide: Manslaughter includes reckless killing; negligent homicide has separate degree-specific provisions.
Vehicle-related deaths: Vehicle-related negligent homicide degrees distinguish the required negligence, impairment and other statutory circumstances.
What the proof must address: First degree requires its additional circumstance, not simply a claim of planning. Apply the burden rules for affirmative mitigation separately.

Read the law and instructions:

Core overview; alternative routes and specialized offenses are not exhaustive. Apply the version in force on the offense date and the instructions given in the case.

Idaho — View more

Murder categories and core requirements: Murder requires malice; first degree includes specified aggravated, deliberate/premeditated and felony-murder routes. Other murder is second degree.
Voluntary / mitigated homicide: Voluntary manslaughter is unlawful killing without malice on sudden quarrel or heat of passion.
Involuntary / reckless / negligent homicide: Involuntary manslaughter has distinct unlawful-act, negligence and negligent-deadly-weapon routes.
Vehicle-related deaths: Vehicular manslaughter is separately defined; unlawful driving, gross negligence or impairment requirements depend on the subsection.
What the proof must address: Prove the elements of the selected ICJI instruction. Criminal negligence is more than simply showing an unfortunate result.

Read the law and instructions:

Core overview; alternative routes and specialized offenses are not exhaustive. Apply the version in force on the offense date and the instructions given in the case.

Illinois — View more

Murder categories and core requirements: First-degree murder includes intent, knowledge of death/strong probability of death or great bodily harm, and felony-murder routes. It does not universally require advance planning.
Voluntary / mitigated homicide: Second-degree murder is specified first-degree murder plus serious-provocation passion or an unreasonable belief in justification—not merely a killing without premeditation.
Involuntary / reckless / negligent homicide: Involuntary manslaughter requires an unintentional killing through reckless acts likely to cause death or great bodily harm.
Vehicle-related deaths: The vehicle-related reckless killing offense is reckless homicide; aggravated DUI causing death is separately addressed.
What the proof must address: The State proves first-degree elements beyond reasonable doubt. The defendant proves second-degree mitigation by a preponderance; the State retains applicable justification burdens.

Read the law and instructions:

Core overview; alternative routes and specialized offenses are not exhaustive. Apply the version in force on the offense date and the instructions given in the case.

Indiana — View more

Murder categories and core requirements: Uses murder without an ordinary first-/second-degree split; knowing/intentional and listed felony-related routes differ.
Voluntary / mitigated homicide: Voluntary manslaughter is knowing/intentional killing under sudden heat, a mitigating circumstance.
Involuntary / reckless / negligent homicide: Involuntary manslaughter involves specified underlying offenses causing death; reckless homicide is separately defined.
Vehicle-related deaths: Fatal impaired-driving offenses appear in the vehicle code; general homicide liability depends on the applicable facts and elements.
What the proof must address: Distinguish sudden heat, the predicate offense for involuntary manslaughter, and recklessness. Prove the charged causal and culpability elements.

Read the law and instructions:

Core overview; alternative routes and specialized offenses are not exhaustive. Apply the version in force on the offense date and the instructions given in the case.

Iowa — View more

Murder categories and core requirements: Murder requires malice. First degree includes deliberate/premeditated and specified other routes, including forcible-felony murder. Other murder is second degree.
Voluntary / mitigated homicide: Voluntary manslaughter involves death under sudden, violent and irresistible passion from serious provocation, with the statute’s cooling-time conditions.
Involuntary / reckless / negligent homicide: Involuntary manslaughter includes unintended death during a qualifying nonforcible-felony/nonfelony public offense or an act likely to cause death or serious injury.
Vehicle-related deaths: §707.6A provides homicide-by-vehicle alternatives involving impairment, recklessness or other specified conduct.
What the proof must address: Match malice, degree-specific facts, provocation or the underlying involuntary/vehicle act to the count submitted.

Read the law and instructions:

Iowa Code Chapter 707

Core overview; alternative routes and specialized offenses are not exhaustive. Apply the version in force on the offense date and the instructions given in the case.

Kansas — View more

Murder categories and core requirements: First degree includes intentional premeditated killing and felony murder; second degree includes intentional killing or reckless extreme-indifference killing. Capital murder has separate conditions.
Voluntary / mitigated homicide: Voluntary manslaughter includes knowing killing on sudden quarrel/heat of passion or an unreasonable but honest belief in justification.
Involuntary / reckless / negligent homicide: Involuntary manslaughter includes reckless killing and other specified unlawful-act or excessive-force routes.
Vehicle-related deaths: Involuntary manslaughter while DUI is separately defined (§21-5405); vehicular homicide (§21-5406) uses a different driving standard.
What the proof must address: Identify intent/premeditation, extreme indifference, recklessness, mitigation or the exact DUI/driving route; causation is required.

Read the law and instructions:

Core overview; alternative routes and specialized offenses are not exhaustive. Apply the version in force on the offense date and the instructions given in the case.

Kentucky — View more

Murder categories and core requirements: Uses murder rather than first-/second-degree murder. It includes intentional killing and wanton extreme-indifference killing.
Voluntary / mitigated homicide: First-degree manslaughter includes specified intent-to-injure killings and intentional killing mitigated by extreme emotional disturbance.
Involuntary / reckless / negligent homicide: Second-degree manslaughter includes wanton killing; reckless homicide uses Kentucky’s distinct recklessness definition.
Vehicle-related deaths: §507.060 requires death resulting from operating a motor vehicle, including specified boats/airplanes, under the influence as described in §189A.010.
What the proof must address: Kentucky’s ‘wanton’ and ‘reckless’ terminology must be read in its own definitions; do not import another state’s terminology.

Read the law and instructions:

Core overview; alternative routes and specialized offenses are not exhaustive. Apply the version in force on the offense date and the instructions given in the case.

Louisiana — View more

Murder categories and core requirements: First degree combines specified intent with enumerated circumstances. Second degree includes specific intent to kill/inflict great bodily harm and specified felony-related killings without that intent.
Voluntary / mitigated homicide: Manslaughter includes murder mitigated by sufficient provocation causing sudden passion/heat of blood before cooling.
Involuntary / reckless / negligent homicide: Manslaughter also covers listed non-intentional unlawful-act killings; negligent homicide is separate.
Vehicle-related deaths: Vehicular homicide requires operation/control, the required causal link, and a listed impairment/alcohol/drug condition contributing to death.
What the proof must address: A premeditation-only comparison misses Louisiana’s structure. Prove the selected intent/predicate route; distinguish mitigation from offense elements.

Read the law and instructions:

Core overview; alternative routes and specialized offenses are not exhaustive. Apply the version in force on the offense date and the instructions given in the case.

Maine — View more

Murder categories and core requirements: Uses murder without ordinary degrees: intentional/knowing killing, depraved-indifference conduct causing death, and another listed route. Felony murder is separate.
Voluntary / mitigated homicide: Adequate provocation causing extreme anger or fear can mitigate intentional/knowing murder to manslaughter.
Involuntary / reckless / negligent homicide: Manslaughter includes reckless or criminally negligent killing; its workplace-death route has additional conditions.
Vehicle-related deaths: A driving death may be prosecuted as manslaughter where its culpability and causation elements are satisfied.
What the proof must address: Distinguish the particular murder route from reckless/criminally negligent manslaughter. Provocation has its own statutory treatment.

Read the law and instructions:

Core overview; alternative routes and specialized offenses are not exhaustive. Apply the version in force on the offense date and the instructions given in the case.

Maryland — View more

Murder categories and core requirements: First degree includes willful, deliberate, premeditated and specified felony/method routes. Other murder is second degree.
Voluntary / mitigated homicide: Voluntary manslaughter is governed substantially by common law and judicial decisions; legally adequate mitigation matters.
Involuntary / reckless / negligent homicide: Involuntary manslaughter is also a common-law offense; the applicable gross-negligence/unlawful-act theory must be identified.
Vehicle-related deaths: §2-209 covers grossly negligent manslaughter by vehicle/vessel. §2-210 and impaired-driving homicide provisions have distinct elements.
What the proof must address: The manslaughter penalty statute is not a complete element list. Consult the governing common-law instructions as well as the code.

Read the law and instructions:

Core overview; alternative routes and specialized offenses are not exhaustive. Apply the version in force on the offense date and the instructions given in the case.

Massachusetts — View more

Murder categories and core requirements: First degree includes deliberate premeditation, extreme atrocity/cruelty and the applicable felony-murder route. Second degree requires malice without an established first-degree basis.
Voluntary / mitigated homicide: Voluntary manslaughter concerns legally recognized mitigation, including reasonable provocation and excessive self-defense where supported.
Involuntary / reckless / negligent homicide: Involuntary manslaughter includes wanton/reckless conduct or a qualifying battery unintentionally causing death.
Vehicle-related deaths: Motor-vehicle homicide is separately addressed in G.L. c.90 §24G; impairment, recklessness/negligence and causation depend on the charged alternative.
What the proof must address: Use the 2026 homicide instructions. Where mitigation is properly at issue, the Commonwealth’s murder burden includes proving its absence beyond reasonable doubt.

Read the law and instructions:

Core overview; alternative routes and specialized offenses are not exhaustive. Apply the version in force on the offense date and the instructions given in the case.

Michigan — View more

Murder categories and core requirements: First degree includes premeditated/deliberate murder and listed statutory routes. Second degree requires the applicable malice: intent to kill, intent for great bodily harm, or the specified life-endangering disregard.
Voluntary / mitigated homicide: When considered as a lesser offense to murder, voluntary manslaughter involves qualifying passion/provocation and cooling-time rules. The standalone instruction (16.8) and lesser-offense instruction (16.9) differ.
Involuntary / reckless / negligent homicide: Involuntary manslaughter includes applicable gross-negligence, unlawful-act or legal-duty theories; statutory firearm manslaughter differs.
Vehicle-related deaths: Use current traffic offenses, including reckless/OWI driving causing death. Old negligent-homicide driving provisions were repealed.
What the proof must address: The homicide instructions changed effective June 1, 2026. Proof of intent and causation must follow the current instruction and supported defense instructions.

Selected element checklists · Michigan

First-degree premeditated murder: fatal causation, an intent to kill, premeditation and deliberation.
Second-degree murder: fatal causation and the required intent to kill, intent for great bodily harm, or knowing creation of a very high risk with awareness of the likely fatal/seriously harmful result.
First-degree felony murder: fatal causation, the required malice, and participation in the specified felony. The felony alone does not replace malice.
Involuntary manslaughter: fatal causation plus the charged gross-negligence or qualifying intentional-injury/unlawful-act theory.
Voluntary manslaughter: the standalone instruction is 16.8; use 16.9 when submitted as a lesser offense to murder. Do not assume their wording and proof structure are identical.

Paraphrased from the adopted June 1, 2026 revisions. Definitions, causation and supported affirmative-defense instructions must also be applied. Read the adopted homicide instructions.

Read the law and instructions:

Core overview; alternative routes and specialized offenses are not exhaustive. Apply the version in force on the offense date and the instructions given in the case.

Minnesota — View more

Murder categories and core requirements: First degree includes premeditated intentional and specified aggravated routes. Second degree includes intentional unpremeditated and specified unintentional killings. Third-degree murder has separate depraved-mind/drug provisions.
Voluntary / mitigated homicide: First-degree manslaughter includes qualifying heat-of-passion killings and other listed conduct.
Involuntary / reckless / negligent homicide: Second-degree manslaughter includes culpable negligence creating unreasonable risk and conscious chances of death/great bodily harm.
Vehicle-related deaths: Criminal vehicular homicide is in §609.2112; impairment, gross negligence and other alternatives differ.
What the proof must address: Do not collapse third-degree murder or manslaughter degrees into another state’s labels. Prove the selected statutory route and causal connection.

Read the law and instructions:

Core overview; alternative routes and specialized offenses are not exhaustive. Apply the version in force on the offense date and the instructions given in the case.

Mississippi — View more

Murder categories and core requirements: First-degree murder includes deliberate-design killing. Second degree includes imminently dangerous depraved-heart killing without premeditated design; capital murder has specified circumstances.
Voluntary / mitigated homicide: Manslaughter includes qualifying heat-of-passion killing without malice under §97-3-35.
Involuntary / reckless / negligent homicide: Other manslaughter provisions include culpable-negligence killing (§97-3-47) and specified unlawful-act routes.
Vehicle-related deaths: Fatal impaired-driving liability is separately addressed in §63-11-30; general homicide may apply where its elements are met.
What the proof must address: Prove deliberate design, depraved-heart culpability or the particular manslaughter/traffic alternative; an unintended death is not automatically manslaughter.

Read the law and instructions:

Core overview; alternative routes and specialized offenses are not exhaustive. Apply the version in force on the offense date and the instructions given in the case.

Missouri — View more

Murder categories and core requirements: First degree requires knowingly causing death after deliberation. Second degree includes knowing killing, serious-injury-purpose killing and felony murder.
Voluntary / mitigated homicide: Voluntary manslaughter includes the specified second-degree route mitigated by sudden passion arising from adequate cause.
Involuntary / reckless / negligent homicide: First-degree involuntary manslaughter requires reckless killing; second-degree involuntary manslaughter requires criminal negligence.
Vehicle-related deaths: DWI causing death is addressed separately in §577.010, with the applicable offense circumstances; general homicide may also be relevant.
What the proof must address: Distinguish deliberation, knowing conduct, recklessness and criminal negligence. The defendant’s burden to inject sudden passion is not the same as proving every murder element.

Read the law and instructions:

Core overview; alternative routes and specialized offenses are not exhaustive. Apply the version in force on the offense date and the instructions given in the case.

Montana — View more

Murder categories and core requirements: Uses deliberate homicide, not first-/second-degree murder. It includes purposeful/knowing killing and specified felony-related killings.
Voluntary / mitigated homicide: Mitigated deliberate homicide concerns purposeful/knowing killing under extreme mental/emotional stress with a reasonable explanation or excuse.
Involuntary / reckless / negligent homicide: Negligent homicide is separate; Montana’s statutory negligence definition governs.
Vehicle-related deaths: Vehicular homicide while under the influence and aggravated vehicular homicide have separate provisions.
What the proof must address: Deliberate does not simply mean advance planning. §45-5-103 expressly gives neither party a burden to prove mitigating circumstances; this differs from many states.

Read the law and instructions:

Core overview; alternative routes and specialized offenses are not exhaustive. Apply the version in force on the offense date and the instructions given in the case.

Nebraska — View more

Murder categories and core requirements: First degree includes purposeful deliberate/premeditated killing and listed other routes. Second degree is intentional killing without premeditation.
Voluntary / mitigated homicide: Manslaughter includes killing without malice on a sudden quarrel.
Involuntary / reckless / negligent homicide: Manslaughter also includes unintentionally causing death while committing an unlawful act.
Vehicle-related deaths: Motor vehicle homicide involves unintended death while operating a vehicle unlawfully; impairment and reckless-driving circumstances affect the applicable route.
What the proof must address: Intent distinguishes second-degree murder from unintentional unlawful-act manslaughter; premeditation and statutory alternatives distinguish first degree.

Read the law and instructions:

Nebraska §§28-302–306

Core overview; alternative routes and specialized offenses are not exhaustive. Apply the version in force on the offense date and the instructions given in the case.

Nevada — View more

Murder categories and core requirements: Murder requires malice. First degree includes deliberate/premeditated, specified felony and other listed routes; other murder is second degree.
Voluntary / mitigated homicide: Voluntary manslaughter is without malice and follows qualifying sudden passion/provocation before cooling.
Involuntary / reckless / negligent homicide: Involuntary manslaughter covers the specified unlawful-act/lawful-act-without-due-caution routes, subject to statutory limits.
Vehicle-related deaths: Vehicular manslaughter (§484B.657) is separate from Chapter 200 manslaughter. DUI causing death and vehicular homicide have additional statutes.
What the proof must address: Do not assume all vehicle deaths use the same negligence standard; distinguish malice, criminal culpability and the traffic statute actually charged.

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Core overview; alternative routes and specialized offenses are not exhaustive. Apply the version in force on the offense date and the instructions given in the case.

New Hampshire — View more

Murder categories and core requirements: First degree includes purposeful killing and listed knowing-killing routes. Second degree includes knowing killing or reckless extreme-indifference killing.
Voluntary / mitigated homicide: Manslaughter includes otherwise-murder under extreme mental/emotional disturbance caused by extreme provocation.
Involuntary / reckless / negligent homicide: Reckless killing is manslaughter; negligent killing is negligent homicide.
Vehicle-related deaths: Negligent homicide includes a specific intoxicated-vehicle/boat alternative; a reckless driving death may instead fit manslaughter.
What the proof must address: Purpose, knowledge, recklessness and negligence are distinct statutory mental states; extreme indifference matters for the reckless-murder route.

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Core overview; alternative routes and specialized offenses are not exhaustive. Apply the version in force on the offense date and the instructions given in the case.

New Jersey — View more

Murder categories and core requirements: Uses murder, classified as a first-degree crime, without a separate ordinary second-degree murder offense. Purposeful/knowing and felony-murder routes differ.
Voluntary / mitigated homicide: Manslaughter includes otherwise-murder committed in heat of passion from reasonable provocation.
Involuntary / reckless / negligent homicide: Reckless killing is manslaughter; reckless extreme-indifference killing is aggravated manslaughter.
Vehicle-related deaths: Reckless vehicular homicide/death by auto and strict-liability vehicular homicide have different requirements.
What the proof must address: An offense’s felony degree is not interchangeable with a murder degree. Prove purpose/knowledge, extreme-indifference recklessness, recklessness or the selected vehicle elements.

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Core overview; alternative routes and specialized offenses are not exhaustive. Apply the version in force on the offense date and the instructions given in the case.

New Mexico — View more

Murder categories and core requirements: First degree includes deliberate/premeditated, felony-murder and specified depraved-mind routes. Second degree includes knowing acts creating a strong probability of death/great bodily harm causing death.
Voluntary / mitigated homicide: Voluntary manslaughter is unlawful killing without malice on sudden quarrel/heat of passion, with sufficient provocation under the instructions.
Involuntary / reckless / negligent homicide: Involuntary manslaughter requires recklessness under State v. Ward (2026), rather than a mere should-have-known civil-negligence standard; qualifying unlawful-/lawful-act conditions also apply.
Vehicle-related deaths: Homicide by vehicle under §66-8-101 has impaired-/reckless-driving and other statutory alternatives.
What the proof must address: For involuntary manslaughter, prove actual awareness of the risk and continued conduct despite it. Ward rejects the old instruction’s should-have-known wording. Use the applicable provocation instruction for murder/manslaughter.

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Core overview; alternative routes and specialized offenses are not exhaustive. Apply the version in force on the offense date and the instructions given in the case.

New York — View more

Murder categories and core requirements: First-degree murder requires intentional killing plus specified circumstances and statutory age conditions. Second degree includes intentional, depraved-indifference and felony-murder routes. Aggravated murder is separate.
Voluntary / mitigated homicide: First-degree manslaughter includes serious-injury-intent killing and an extreme-emotional-disturbance reduction, among other routes.
Involuntary / reckless / negligent homicide: Second-degree manslaughter includes reckless killing. Criminally negligent homicide is separate.
Vehicle-related deaths: Vehicular manslaughter has degrees; aggravated vehicular homicide adds distinct circumstances. Impairment, causation and the particular aggravators matter.
What the proof must address: A planned killing is not automatically first degree; the listed first-degree conditions must be proved. Use the route-specific CJI element list.

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Core overview; alternative routes and specialized offenses are not exhaustive. Apply the version in force on the offense date and the instructions given in the case.

North Carolina — View more

Murder categories and core requirements: First degree includes deliberate/premeditated and listed method/felony routes. Second degree is other murder with the applicable malice.
Voluntary / mitigated homicide: Voluntary manslaughter can involve qualifying heat of passion or imperfect self-defense; common-law decisions supply important elements.
Involuntary / reckless / negligent homicide: Involuntary manslaughter involves qualifying unintentional unlawful-act or culpably negligent killing.
Vehicle-related deaths: Death-by-vehicle statutes distinguish impaired-driving felony and other traffic-violation misdemeanor routes, each requiring proximate causation.
What the proof must address: Prove malice and the additional first-degree basis where charged. For traffic counts, prove the required violation actually caused the death.

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Core overview; alternative routes and specialized offenses are not exhaustive. Apply the version in force on the offense date and the instructions given in the case.

North Dakota — View more

Murder categories and core requirements: Uses murder without ordinary first-/second-degree names; intentional/knowing, extreme-indifference and specified felony-related routes differ.
Voluntary / mitigated homicide: Extreme emotional disturbance can change the statutory murder classification; it is not an offense called voluntary manslaughter.
Involuntary / reckless / negligent homicide: Manslaughter requires recklessly causing death; negligent homicide requires negligent causation under the statutory definition.
Vehicle-related deaths: Vehicle deaths may fit general homicide statutes and applicable impaired-driving provisions; culpability and causation must be established.
What the proof must address: Do not assume mitigation changes murder to manslaughter here. The code specifically treats certain extreme-emotional-disturbance killings as a different murder felony class.

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NDCC Chapter 12.1-16

Core overview; alternative routes and specialized offenses are not exhaustive. Apply the version in force on the offense date and the instructions given in the case.

Ohio — View more

Murder categories and core requirements: Uses aggravated murder and murder, rather than first-/second-degree murder. Murder includes purposeful killing and a specified offense-of-violence felony route.
Voluntary / mitigated homicide: Voluntary manslaughter requires a knowing killing under sudden passion/rage caused by serious provocation reasonably sufficient to incite deadly force.
Involuntary / reckless / negligent homicide: Involuntary manslaughter requires death proximately resulting from a qualifying felony or misdemeanor; reckless/negligent homicide are distinct offenses.
Vehicle-related deaths: §2903.06 distinguishes aggravated vehicular homicide, vehicular homicide and vehicular manslaughter through different underlying conduct.
What the proof must address: Involuntary manslaughter is not simply a generic negligence offense. Identify the predicate offense, causation and route-specific culpability.

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Core overview; alternative routes and specialized offenses are not exhaustive. Apply the version in force on the offense date and the instructions given in the case.

Oklahoma — View more

Murder categories and core requirements: First degree includes malice-aforethought and enumerated felony/other statutory routes. Second degree includes imminently dangerous depraved-mind killing and specified other felony-related killing.
Voluntary / mitigated homicide: First-degree manslaughter includes certain no-design-to-kill heat-of-passion, misdemeanor and other specified killings; the statute’s alternatives matter.
Involuntary / reckless / negligent homicide: Second-degree manslaughter addresses qualifying culpable-negligence killing outside the higher homicide categories.
Vehicle-related deaths: Negligent homicide and DUI-related manslaughter provisions require separate analysis; not every fatal collision establishes them.
What the proof must address: Use the current version of 21 O.S. §§701.7, 701.8, 711 and 716. The statutory heat-of-passion route is not identical to another state’s voluntary manslaughter.

Read the law and instructions:

Core overview; alternative routes and specialized offenses are not exhaustive. Apply the version in force on the offense date and the instructions given in the case.

Oregon — View more

Murder categories and core requirements: Uses aggravated murder and first-/second-degree murder. Second degree includes intentional and specified felony-murder routes; first degree adds listed circumstances.
Voluntary / mitigated homicide: First-degree manslaughter includes an intentional killing reduced by extreme emotional disturbance.
Involuntary / reckless / negligent homicide: First-degree manslaughter also includes reckless extreme-indifference killing; second degree includes reckless killing. Criminally negligent homicide is separate.
Vehicle-related deaths: Aggravated vehicular homicide has specified conditions; other driving deaths can fall under the applicable general homicide offense.
What the proof must address: Extreme-indifference recklessness is not automatically labeled murder here. Distinguish murder aggravators from manslaughter culpability.

Read the law and instructions:

ORS Chapter 163, homicide provisions

Core overview; alternative routes and specialized offenses are not exhaustive. Apply the version in force on the offense date and the instructions given in the case.

Pennsylvania — View more

Murder categories and core requirements: First degree is intentional killing as defined by statute. Second degree is qualifying felony murder. Other murder is third degree.
Voluntary / mitigated homicide: Voluntary manslaughter includes serious-provocation passion or an unreasonable belief that killing was justified.
Involuntary / reckless / negligent homicide: Involuntary manslaughter involves reckless or grossly negligent lawful/unlawful conduct directly causing death.
Vehicle-related deaths: Homicide by vehicle (§3732) and homicide by vehicle while DUI (§3735) have separate traffic-code elements.
What the proof must address: Do not call every intentional but unpremeditated killing second-degree murder: Pennsylvania’s second degree is its felony-murder category.

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18 Pa.C.S. Chapter 25

Core overview; alternative routes and specialized offenses are not exhaustive. Apply the version in force on the offense date and the instructions given in the case.

Rhode Island — View more

Murder categories and core requirements: Murder requires malice. First degree includes premeditated/deliberate and specified felony/other statutory routes; other murder is second degree.
Voluntary / mitigated homicide: Voluntary manslaughter is defined through case law, including intentional killing without malice in heat of passion from adequate legal provocation.
Involuntary / reckless / negligent homicide: Involuntary manslaughter includes unintentional nonfelony-unlawful-act or criminally negligent lawful-act killing.
Vehicle-related deaths: Driving so as to endanger resulting in death requires reckless disregard and proximate causation; DUI-related death is separately addressed.
What the proof must address: The manslaughter penalty statute alone does not state all elements; the governing judicial definition matters.

Read the law and instructions:

Core overview; alternative routes and specialized offenses are not exhaustive. Apply the version in force on the offense date and the instructions given in the case.

South Carolina — View more

Murder categories and core requirements: Uses murder with express/implied malice, without an ordinary first-/second-degree murder split.
Voluntary / mitigated homicide: Voluntary manslaughter requires sudden heat of passion upon sufficient legal provocation; both must be present.
Involuntary / reckless / negligent homicide: Involuntary manslaughter requires the applicable unintentional killing and criminal negligence, defined as reckless disregard for others’ safety.
Vehicle-related deaths: Reckless homicide and felony DUI resulting in death are separate traffic provisions.
What the proof must address: Malice versus legally sufficient passion/provocation is central; anger alone does not establish voluntary manslaughter.

Read the law and instructions:

Core overview; alternative routes and specialized offenses are not exhaustive. Apply the version in force on the offense date and the instructions given in the case.

South Dakota — View more

Murder categories and core requirements: First degree includes premeditated-design and enumerated felony routes. Second degree involves imminently dangerous depraved-mind conduct without a premeditated design to kill.
Voluntary / mitigated homicide: First-degree manslaughter has listed no-design-to-kill routes, including specified passion/dangerous-weapon circumstances; it is not a universal synonym for voluntary manslaughter.
Involuntary / reckless / negligent homicide: Second-degree manslaughter is reckless killing outside the higher homicide categories.
Vehicle-related deaths: Vehicular homicide requires prohibited impairment, negligent vehicle operation, no design to kill and resulting death.
What the proof must address: Distinguish premeditated design, depraved-mind conduct, the specific first-degree manslaughter alternative and recklessness.

Read the law and instructions:

Core overview; alternative routes and specialized offenses are not exhaustive. Apply the version in force on the offense date and the instructions given in the case.

Tennessee — View more

Murder categories and core requirements: First degree includes premeditated intentional killing and listed felony/other routes. Second degree includes knowing killing; other statutory routes must be separately checked.
Voluntary / mitigated homicide: Voluntary manslaughter is intentional/knowing killing in passion produced by adequate provocation sufficient to make a reasonable person act irrationally.
Involuntary / reckless / negligent homicide: Reckless homicide and criminally negligent homicide are separate offenses; there is no ordinary offense named involuntary manslaughter.
Vehicle-related deaths: Vehicular homicide and aggravated vehicular homicide have their own conduct, impairment and causation conditions.
What the proof must address: Distinguish premeditation, knowing killing, adequate provocation, recklessness and criminal negligence; use the judge’s sequential/lesser-offense instructions.

Read the law and instructions:

Core overview; alternative routes and specialized offenses are not exhaustive. Apply the version in force on the offense date and the instructions given in the case.

Texas — View more

Murder categories and core requirements: Uses murder and capital murder, not ordinary first-/second-degree murder offenses. Murder includes intentional/knowing, serious-injury-intent and felony-related routes.
Voluntary / mitigated homicide: Sudden passion arising from adequate cause is a murder punishment-stage issue proved by the defendant by a preponderance; it is not a separate voluntary-manslaughter verdict.
Involuntary / reckless / negligent homicide: Manslaughter requires reckless killing; criminally negligent homicide is separate.
Vehicle-related deaths: Intoxication manslaughter requires the specified operation, intoxication and death caused by that intoxication by accident or mistake.
What the proof must address: A first-/second-degree felony classification is not a murder degree. Separate guilt-phase elements from punishment-stage sudden-passion mitigation.

Read the law and instructions:

Core overview; alternative routes and specialized offenses are not exhaustive. Apply the version in force on the offense date and the instructions given in the case.

Utah — View more

Murder categories and core requirements: Uses aggravated murder and murder rather than an ordinary degree pair. Murder includes intentional/knowing, serious-injury-intent, depraved-indifference and predicate-offense routes.
Voluntary / mitigated homicide: Special mitigation or the statutory imperfect-justification route can reduce murder to manslaughter under the relevant provisions.
Involuntary / reckless / negligent homicide: Manslaughter includes reckless killing; negligent homicide is separately defined.
Vehicle-related deaths: Automobile homicide has negligence/criminal-negligence and alcohol/drug-related requirements. Other vehicle-specific homicide provisions may apply.
What the proof must address: Aggravated murder needs its additional circumstance. Keep the burden for statutory special mitigation distinct from proof of murder elements.

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Current Utah criminal-homicide provisions

Core overview; alternative routes and specialized offenses are not exhaustive. Apply the version in force on the offense date and the instructions given in the case.

Vermont — View more

Murder categories and core requirements: First degree includes deliberate/premeditated and specified felony/method routes. Other murder is second degree; aggravated murder has additional statutory circumstances.
Voluntary / mitigated homicide: Voluntary manslaughter is developed through common law, including qualifying provocation-related mitigation.
Involuntary / reckless / negligent homicide: Involuntary manslaughter includes reckless or criminally negligent causation under the applicable instructions.
Vehicle-related deaths: Negligent/grossly negligent operation resulting in death and DUI-death provisions are distinct vehicle offenses.
What the proof must address: §2304 states penalties rather than the complete manslaughter definition; consult case law and the model homicide instructions.

Read the law and instructions:

Core overview; alternative routes and specialized offenses are not exhaustive. Apply the version in force on the offense date and the instructions given in the case.

Virginia — View more

Murder categories and core requirements: Uses aggravated, first- and second-degree murder. First degree includes willful deliberate/premeditated and listed felony/method routes; other murder is second degree.
Voluntary / mitigated homicide: Voluntary manslaughter is a common-law unlawful killing without malice, including qualifying heat-of-passion circumstances.
Involuntary / reckless / negligent homicide: Involuntary manslaughter involves qualifying unintentional killing through criminally culpable conduct; its common-law elements matter.
Vehicle-related deaths: DUI unintentionally causing death is involuntary manslaughter; gross, wanton and culpable disregard adds aggravated involuntary manslaughter under §18.2-36.1.
What the proof must address: Prove malice/degree facts or the applicable manslaughter route. Statutory DUI causation and the aggravated conduct requirement are distinct.

Read the law and instructions:

Core overview; alternative routes and specialized offenses are not exhaustive. Apply the version in force on the offense date and the instructions given in the case.

Washington — View more

Murder categories and core requirements: First degree includes premeditated-intent, extreme-indifference and listed felony routes. Second degree includes intentional killing without premeditation and other felony murder.
Voluntary / mitigated homicide: There is no separate offense named voluntary manslaughter; do not import another state’s heat-of-passion verdict structure.
Involuntary / reckless / negligent homicide: First-degree manslaughter requires reckless killing; second degree requires criminal negligence. Homicide by abuse is separate.
Vehicle-related deaths: Vehicular homicide requires the statutory causal link and DUI, recklessness or disregard for others’ safety.
What the proof must address: Prove the exact murder alternative or reckless/negligent manslaughter mental state. Vehicular alternatives require their own proof.

Read the law and instructions:

Core overview; alternative routes and specialized offenses are not exhaustive. Apply the version in force on the offense date and the instructions given in the case.

West Virginia — View more

Murder categories and core requirements: First degree includes deliberate/premeditated and listed method/felony routes. Other murder is second degree.
Voluntary / mitigated homicide: Voluntary manslaughter is a common-law unlawful intentional killing without malice; heat of passion is not a mandatory standalone element in every case.
Involuntary / reckless / negligent homicide: Involuntary manslaughter is a separate common-law unintentional homicide; the relevant unlawful/negligent conduct must be established.
Vehicle-related deaths: Traffic-related negligent homicide and impaired-driving death provisions are distinct from ordinary murder/manslaughter.
What the proof must address: Use governing state case law and instructions; the code’s manslaughter penalty sections do not supply a complete element definition.

Read the law and instructions:

Core overview; alternative routes and specialized offenses are not exhaustive. Apply the version in force on the offense date and the instructions given in the case.

Wisconsin — View more

Murder categories and core requirements: Uses intentional and reckless homicide categories rather than the usual murder/manslaughter labels. First-degree intentional homicide requires intent to kill; second-degree intentional homicide reflects specified mitigation.
Voluntary / mitigated homicide: Adequate provocation and other statutory mitigation can reduce first- to second-degree intentional homicide.
Involuntary / reckless / negligent homicide: First-degree reckless homicide requires criminal recklessness plus utter disregard for human life; second-degree reckless homicide lacks that added circumstance.
Vehicle-related deaths: Homicide by intoxicated use of a vehicle and homicide by negligent vehicle operation are distinct offenses.
What the proof must address: Both degrees of intentional homicide involve intent. Do not equate second-degree intentional homicide with accidental killing.

Read the law and instructions:

Core overview; alternative routes and specialized offenses are not exhaustive. Apply the version in force on the offense date and the instructions given in the case.

Wyoming — View more

Murder categories and core requirements: First degree includes purposeful premeditated-malice and listed felony routes. Second degree is purposeful malicious killing without premeditation.
Voluntary / mitigated homicide: Voluntary manslaughter includes qualifying sudden-heat-of-passion killing without malice.
Involuntary / reckless / negligent homicide: Involuntary manslaughter includes reckless killing subject to vehicle-related exclusions; criminally negligent homicide is separate.
Vehicle-related deaths: Homicide by vehicle and aggravated homicide by vehicle have different negligent/reckless/impairment requirements.
What the proof must address: Distinguish purpose and malice, premeditation, recklessness and criminal negligence; apply the vehicle exception rather than assuming all reckless deaths use manslaughter.

Read the law and instructions:

Wyoming Title 6, §§6-2-101–107

Core overview; alternative routes and specialized offenses are not exhaustive. Apply the version in force on the offense date and the instructions given in the case.

General sources and use of this guide

State-specific sources appear inside their own panels. Research dates identify when materials were checked, not a guarantee that every legislative amendment or appellate development is captured. Offense dates, enacted effective dates, controlling decisions and the trial judge’s instructions must be reconciled for a particular prosecution.

Related Clinical Lens guide: Torso trauma: how chest and abdominal injuries can cause death.

Educational legal reporting from Jaded Evidence. This page explains categories and burdens; it does not decide any person’s guilt or provide case-specific legal advice.