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Former San Francisco PD Sergeant Kills Wife, Daughter in Double Murder-Suicide, Sources Say

Sources say the former San Francisco police sergeant killed his wife and daughter before fatally shooting himself, and investigators have given no motive.

  • On Sunday, the Marin County Sheriff's Office launched an investigation into a murder-suicide that left three people dead in a residence in Strawberry, an unincorporated community near Mill Valley, California.
  • Sources identified the suspect as retired San Francisco Police Sergeant Kevin Mannix, 68, who allegedly killed his estranged wife, former SFPD Deputy Chief Ann Mannix, 65, and their 24-year-old daughter, Katie.
  • Deputies responded to a 911 call reporting shots fired at 5:03 p.m. on Sunday, with a caller managing to escape before law enforcement secured the perimeter and entered the residence.
  • Ann Mannix was remembered by the San Francisco Police Officers Association as a trailblazer who became the first woman to join and lead the department's SWAT team, rising to command Field Operations.
  • Authorities confirmed there is no ongoing threat to the public, while spokesperson Miguel Almaguer noted the active investigation and referred those in need to the National Domestic Violence Hotline.
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Former San Francisco PD sergeant kills wife, daughter in double murder-suicide, sources say

Sources with intimate knowledge of what happened say that Kevin Mannix shot and killed his wife, then his daughter, before turning the gun on himself.

·Chicago, United States
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  • 67% of the sources are Center
67% Center

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thecount.com broke the news on Monday, October 12, 2026.
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