Retired San Francisco Police Sergeant Killed His Wife, a Former Deputy Chief, and Their Daughter, Sheriff Says

A retired San Francisco police sergeant shot and killed his wife, a former deputy chief of the department, and their adult daughter before taking his own life at the family’s home near Mill Valley, California, on Sunday, Oct. 11, 2026, the Marin County Sheriff’s Office said.

The sheriff’s office identified the three as Ann Mannix, 65, a retired San Francisco Police Department deputy chief; her husband, Kevin Mannix, 68, a retired sergeant; and their daughter, Katherine Mannix, 24. A preliminary investigation points to a double murder-suicide, with Kevin Mannix as the suspected shooter, the sheriff’s office said, according to CBS News San Francisco and Fox News.

A 911 call from the house

Deputies were called to a home on Strawberry Circle, in the unincorporated community of Strawberry near Mill Valley, at about 5 p.m. Sunday after a 911 call reporting a shooting. The person who called got out of the house safely, the sheriff’s office said. Deputies then went inside and found the three dead.

The sheriff’s office said there was no ongoing threat to the community. No motive has been released. Autopsies were scheduled for Tuesday, Oct. 13, 2026.

“A trailblazer”

Ann Mannix was the first woman to join and to lead the department’s SWAT team, and she went on to lead its field operations and special operations bureaus, the San Francisco Police Officers Association said. She retired as a deputy chief in 2021. Kevin Mannix retired from the department in 2018, KTVU reported.

“There are no words that can fully capture the depth of this tragedy, nor are there simple answers to the painful questions we are all asking,” association president Louis Wong said in a statement. He called Ann Mannix “a trailblazer in our department.”

If you or someone you know is in crisis, call or text 988 to reach the Suicide & Crisis Lifeline.