A quiet California neighborhood was left reeling after a family tragedy claimed the lives of retired San Francisco Police Department Deputy Chief Ann Mannix, 65, her 24-year-old daughter, Katherine “Katie” Mannix, and Ann’s husband, retired police sergeant Kevin Mannix. On October 11, 2026, deputies responded to reports of gunfire at the family’s home in Strawberry, near Tiburon. According to reports, one of the couple’s daughters escaped the house and called 911, telling dispatchers that her father had shot her mother and sister. Responding officers later found all three family members dead inside the residence. Investigators described the incident as a suspected double murder-suicide, with Kevin believed to have killed Ann and Katie before taking his own life. The deaths shocked former colleagues and neighbors who had known the family for years, particularly because Ann had recently been enjoying retirement, attending basketball games, and sharing photographs from San Francisco’s Fleet Week celebrations.
As friends began remembering Ann’s final conversations, details emerged suggesting that her private life had been more difficult than some people realized. Ann had spent decades in law enforcement, eventually becoming the first woman to join and later lead the San Francisco Police Department’s SWAT team. She retired in 2021 after 35 years of service, looking forward to traveling, spending time with loved ones, and enjoying a quieter life. But at a gathering approximately two weeks before the shooting, her friend and San Francisco attorney Marie Hurabiell recalled that Ann had shared a significant personal decision: she planned to divorce Kevin. Hurabiell said Ann appeared hopeful about starting a new chapter, even though she understood that separation would bring challenges. Another longtime friend also acknowledged that the marriage had not been going well. Those conversations have prompted painful questions about what may have been happening behind the scenes, although investigators have not established that the planned divorce was the motive for the killings.
Katie, meanwhile, had been preparing for her future and was studying to become a nurse. Relatives described the 24-year-old as warm, playful, and thoughtful, someone who regularly contacted loved ones simply to remind them that she cared. Her cousin Brendan Mannix remembered her generous personality and excitement about her career plans. Ann’s older brother, Richard Corriea, also remembered her as a devoted mother who balanced a demanding police career with raising three children. Former colleagues described Ann as a respected leader, while people who knew Kevin professionally said they were shocked by the violence attributed to him. Authorities reported no previous police calls to the family’s address, and the investigation continued as officials worked to establish the circumstances surrounding the deaths.
The tragedy has left the surviving family members facing an unimaginable loss. Ann had reportedly hoped to become a grandmother, while Katie was just beginning to build the life she had envisioned. Their final days had included ordinary pleasures, friendships, and plans for the future, making the sudden loss even harder for those who loved them. As investigators continue examining the case, friends and relatives are remembering the two women for their dedication, kindness, and the lives they hoped to lead. Their stories now stand alongside the unanswered questions surrounding the events that ended their lives.
