Jaded Evidence · Interactive Investigation Case File
Ann, Katherine and Kevin Mannix / Marin County deaths
Marin County, California · Updated October 26, 2026
Current status: Marin County authorities describe the deaths as a suspected double murder-suicide; no criminal prosecution is pending against the deceased alleged shooter.
Case file contents
Overview
Deputies responding to reported gunshots at a Strawberry Circle home on October 11, 2026 found retired SFPD Deputy Chief Ann Mannix, 65, her daughter Katherine “Katie” Mannix, 24, and retired SFPD Sergeant Kevin Mannix, 68, dead. Authorities say Kevin is suspected of killing Ann and Katie before killing himself.
Verified timeline
- October 11, 2026, 5:03 p.m. — A caller reported gunshots and escaped the home; deputies secured the property.
- October 11 — Deputies entered and found the three deceased.
- October 12 — Authorities identified the family and publicly described a suspected double murder-suicide.
- October 23 — Ann and Katie were honored at a public funeral in San Francisco.
Evidence and source review
What the reviewed record supports
The sheriff’s classification remains part of an ongoing investigation. Reports that Kevin had been drinking or that the couple was divorcing are attributed accounts and do not independently establish motive or sequence.
What this page does not treat as established
Unproven allegations, disputed witness accounts, inferred motives and incomplete forensic findings are labeled and are not presented as court findings.
Legal status
Marin County authorities describe the deaths as a suspected double murder-suicide; no criminal prosecution is pending against the deceased alleged shooter.
Unless a final adjudication is stated, every accused person is presumed innocent unless and until proven guilty in court.
Open questions
What do the autopsies, firearm testing, 911 call and scene evidence establish? Was there a documented history of threats or domestic violence? Will the sheriff release a final report and confirmed motive?
Sources reviewed
- [1] SFGATE — sheriff’s account and identifications
- [2] Los Angeles Times — official ages and scene response
- [3] San Francisco Chronicle — October 23 memorial and case context
Links were checked during the October 26, 2026 review. Source descriptions identify the reporting or record used; they do not convert an allegation into a fact.
Outstanding records and follow-up
Records still needed
Marin County Sheriff final report; coroner records; 911 audio and dispatch timeline; firearm tracing and ballistics; any restraining-order or divorce filings authorities identify as relevant.
Update standard
Future updates should distinguish original records, agency statements, witness accounts, prosecutor allegations, defense positions, expert conclusions and court findings.