Former Police Deputy Chief and Daughter Found Dead in California Home

A former San Francisco police deputy chief and her 24-year-old daughter have died alongside her retired police officer husband in a case being investigated as a suspected murder-suicide in California.

Ann Mannix, 65, her daughter Katie Mannix, 24, and her husband Kevin Mannix, 68, were found dead at a residence in Marin County on Sunday evening. Authorities responded after receiving reports of gunfire. The circumstances surrounding the deaths remain under investigation.

Ann Mannix spent decades serving in law enforcement and became a respected figure within the San Francisco Police Department. She was recognized as the first woman to join the department’s SWAT team and later became its leader, marking an important milestone in the department’s history.

Her career continued to advance, and she eventually held senior leadership positions overseeing major operational divisions. In 2018, she was appointed deputy chief of the Field Operations Bureau. The following year, she took on a leadership role in the Special Operations Bureau.

News of her death has deeply affected current and former members of the department. Police Chief Derrick Lew informed department employees of the tragedy and encouraged them to support one another during the difficult period. He also reminded staff that counseling and other support services were available.

Kevin Mannix also had a lengthy career in law enforcement. He retired from the San Francisco Police Department in June 2018 after 27 years of service.

In a farewell message shared the following month, Kevin reflected on the relationships he had built throughout his career and expressed gratitude for the friendships he would carry with him into retirement. His years of service included work at Taraval Station and other assignments within the department.

The San Francisco Police Officers Association released a statement expressing grief over the deaths of Ann, Kevin, and their daughter. The organization said the tragedy had left officers and retirees struggling to process the loss.

The association also highlighted Ann’s achievements, emphasizing her groundbreaking role in the SWAT team and her later leadership of two major bureaus. Kevin’s decades of service were also remembered as an important part of his contribution to the department.

Tributes have also come from people who knew Ann personally. One of her closest friends, who said they had shared a friendship spanning six decades, expressed profound sadness over her death and remembered the long bond they had shared.

The loss has also prompted condolences from San Francisco Mayor Daniel Lurie. He acknowledged Ann’s decades of service to the city and recognized her achievements as a pioneer within the police department.

Her career represented a significant chapter in the department’s history, particularly for women entering specialized law enforcement roles. From joining the SWAT team to leading major operational divisions, Ann built a professional legacy that colleagues and city officials have publicly recognized.

Meanwhile, investigators continue working to establish the circumstances surrounding the deaths in Marin County. Authorities have described the case as a suspected murder-suicide, but the investigation remains an important part of determining exactly what happened.

The deaths have left family members, friends, and the wider law enforcement community mourning three lives lost in a single incident. For those who worked alongside Ann and Kevin, the tragedy is also the loss of former colleagues who devoted many years to public service.

As tributes continue, Ann Mannix is being remembered for breaking barriers in policing and serving San Francisco over several decades. Kevin is being remembered for his long career with the department, while loved ones mourn the loss of their daughter, Katie.

The investigation remains ongoing, and further details may emerge as authorities continue examining the case.

Anyone experiencing emotional distress or struggling with thoughts of suicide is encouraged to seek support from a trusted person or qualified mental health professional. In the United States, people can call or text 988 to reach the Suicide & Crisis Lifeline for free, confidential support.