Full Breakdown
Tragic Murder-Suicide Claims Retired San Francisco Police Leaders and Daughter
By Drooid · · How we work
The Incident
On Oct. 11, deputies from the Marin County Sheriff’s Office responded to a 911 call reporting gunfire inside a residence on Strawberry Circle, near Mill Valley. The caller, who was inside the home, escaped unharmed and alerted authorities. Deputies entered the house and found three deceased bodies: Kevin Mannix, 68, a retired SFPD sergeant; his wife Ann Mannix, 65, a retired SFPD deputy chief; and their adult daughter, Katie Mannix, 24. Kevin Mannix was identified as the suspected shooter and died by suicide.
Background of the Mannix Family
- Ann Mannix – 65, retired SFPD deputy chief who led the department’s SWAT team and later headed the Field Operations and Special Operations Bureaus.
- Kevin Mannix – 68, retired SFPD sergeant with 27 years of service, retired in June 2018.
Timeline
- Oct. 11, ~5:00 p.m. – 911 call placed from inside the home.
- Minutes later – Deputies arrived, secured the scene, and found three bodies.
- Sunday night – SFPD Chief Derrick Lew sent a department-wide message describing the loss “with heavy hearts.”
- Monday – The San Francisco Police Officers Association issued a public statement mourning the family.
Official Statements & Responses
- Chief Derrick Lew (SFPD): Expressed the department’s shared grief and reminded personnel that the Behavioral Science Unit was available for support.
- San Francisco Police Officers Association: President Louis Wong said, “It is with profound sadness, shock, and heavy hearts that we address the devastating news that emerged out of Marin County on Sunday evening.”
- Mayor Daniel Lurie: Highlighted Ann Mannix’s pioneering role in the department.
On-the-Ground Reports
The caller who escaped the home was the source of the initial 911 call.
Conflicting Reports & Gaps
- Age of the daughter: Most sources list Katie as 24; a few outlets reported her as 25.
- Name of the daughter: Most reports use “Katie Mannix,” while one press release identified her as “Katherine Mannix.”
- Marital status: Some accounts describe the couple as “estranged” or “in the process of divorcing,” while others note they were not formally separated.
Early statements did not confirm the victims’ identities; later releases from the SFPOA and local police did. Authorities have not disclosed a motive.
Verbatim Quote
- “It is with profound sadness, shock, and heavy hearts that we address the devastating news that emerged out of Marin County on Sunday evening.” — Louis Wong, president of the San Francisco Police Officers Association
Why It Matters
The deaths of two retired senior officers and their daughter have shocked the SFPD community, prompting immediate outreach to mental-health resources such as the department’s Behavioral Science Unit and the national 988 Suicide & Crisis Lifeline. Authorities emphasized that there is no ongoing threat to the surrounding community and pledged transparency as the investigation continues.