Three people were found dead Sunday evening inside a home on Strawberry Circle in unincorporated Marin County after a 911 call reporting gunshots, prompting an active sheriff’s office investigation that sources say involves two retired San Francisco police officers and their adult daughter.
Deputies Respond to Strawberry Circle Residence
The Marin County Sheriff’s Office received an emergency call at 5:03 p.m. on Sunday, Oct. 11, 2026, reporting shots fired inside a residence on Strawberry Circle in the unincorporated community of Strawberry, near Mill Valley according to a department news release.
Deputies arrived at the scene within minutes. They made contact with the 911 caller, who had safely exited the residence before law enforcement entered as CBS News reported. After securing a perimeter around the property, deputies went inside and discovered three individuals dead.
Detectives from the sheriff’s office investigations unit processed the scene Sunday night while authorities awaited a search warrant to conduct a more thorough examination noted KTVU. Investigators confirmed that there is no known threat to the community
and noted that the address had no previous calls for service.
Department Memo Names Former Police Veterans
While the sheriff’s office initially withheld the identities of the deceased pending notification and coroner processing, sources familiar with the case told the San Francisco Chronicle that the dead include 68-year-old retired San Francisco police sergeant Kevin Mannix, his estranged wife, retired SFPD Deputy Chief Ann Mannix, 65, and their 24-year-old daughter, Katie.
The news was shared with San Francisco police personnel late Sunday evening in a department-wide message from Chief Derrick Lew. In his communication, Lew told officers that the agency was sharing the development with heavy hearts
and urged staff to Please keep their family in your prayers,
according to Yahoo. The department also made its behavioral science unit available to any personnel needing support.
Careers and Community Ties in San Francisco
Ann Mannix built a career within the San Francisco Police Department, ascending through the ranks to become deputy chief of the Field Operations Bureau in 2018 before taking over the Special Operations Bureau the following year department records show.
Outside of her formal duties, she was a fourth-generation San Franciscan from the Jordan Park neighborhood who attended public school in the Richmond District. She volunteered as a youth basketball coach for the Catholic Youth Organization, served with the National Charity League, and participated in the Ignatian Guild at St. Ignatius College Preparatory noted KTVU alongside volunteering with the San Francisco Police Activities League.
Kevin Mannix served the department for 27 years before retiring as a sergeant in June 2018 as documented in Taraval Station archives. In a farewell message published at the time of his departure, he wrote, I leave the SFPD, but I am taking your friendships with me forever,
outlining plans to spend additional time with family and friends.
Investigators Treat Shooting as Murder-Suicide
Investigators continue to examine the precise circumstances surrounding the shooting, with sources indicating to ABC7 Eyewitness News that the incident is being investigated as a murder-suicide. The Marin County Sheriff’s Office stated that the inquiry remains in its very early stages and that further details will be released as they become available.
Help is available for anyone affected by domestic violence or crisis situations. Assistance can be reached 24/7 through the National Domestic Violence Hotline at 800-799-7233, by texting START to 88788 noted the San Francisco Chronicle, or by contacting the Suicide and Crisis Lifeline by calling or texting 988 as highlighted by ABC7.