Retired San Francisco police sergeant killed wife and daughter before taking own life in Marin

Two retired San Francisco police officers and their adult daughter were killed Sunday evening in a murder-suicide at their Marin County home, according to multiple sources familiar with the shooting.

Kevin Mannix , 68, a retired San Francisco police sergeant, shot and killed his estranged wife, retired SFPD Deputy Chief Ann Mannix , 65, and their youngest daughter, Katie , 24, before killing himself, according to the sources.

The Mannixes' deaths were announced to San Francisco police officers Sunday night by Chief Derrick Lew, who wrote in a department-wide message that the agency was sharing the news "with heavy hearts."

"Please keep their family in your prayers," Lew wrote.

The Marin County Sheriff's Office has not publicly released the identities of the three people or disclosed what led to the shooting.

The sheriff's office received a 911 call at 5:03 p.m. reporting shots fired inside a residence on Strawberry Circle in Mill Valley, according to a department news release.

Deputies arrived within minutes and contacted the person who made the call, who had safely exited the home, the sheriff's office said. Deputies secured a perimeter and entered the residence, where they found three people dead.

Detectives from the sheriff's office investigations unit were processing the scene Sunday night.

"There is no known threat to the community," the sheriff's office said.

Ann Mannix rose through the SFPD ranks to become deputy chief of the Field Operations Bureau in 2018 and was assigned to oversee the Special Operations Bureau the following year, according to department records . She also became the first woman to join and later lead the department's SWAT team

Kevin Mannix retired from the department in June 2018 after 27 years of service.

In a farewell message published by Taraval Station that July, Mannix reflected on the relationships he had formed during his career and his plans to spend more time with family and friends.

"I leave the SFPD, but I am taking your friendships with me forever," Mannix wrote.

Lew's message to department personnel Sunday also said the department's behavioral science unit was available to members who needed support.

The sheriff's office said the investigation was in its very early stages and that it would provide additional information as it becomes available.