Family of Victims Criticizes Officer in Tragic Murder-suicide

WHO:

NY Post - Ann Mannix was a trailblazer in the San Francisco Police Department.

US Magazine - Kevin Mannix was a retired sergeant and Ann Mannix's husband; Katie Mannix was their adult daughter.

WHAT:

US Magazine - Kevin Mannix killed his wife, Ann Mannix, and their daughter, Katie Mannix, in a murder-suicide.

NY Post - Brendan Mannix, a family member, described Ann as someone who helped other women advance in the police department and Katie as an aspiring nurse who encouraged loved ones.

WHERE:

US Magazine - The murder-suicide occurred at the Mannix family home in Marin County, California.

WHEN:

US Magazine - The incident took place on the evening of Sunday.

WHY:

US Magazine - A friend indicated that Kevin Mannix and Ann Mannix were allegedly experiencing marital issues prior to the incident.

HOW:

US Magazine - The method of the murder-suicide involved Kevin Mannix killing both Ann and Katie.

(UPDATED October 13, 2026 23:03 UTC)

In a tragic incident, Kevin Mannix killed his wife, Ann Mannix, a trailblazer in the San Francisco Police Department, and their adult daughter, Katie, in a murder-suicide at their home in Marin County, California. Family member Brendan Mannix described Ann as a supportive figure for women in the police force and Katie as an aspiring nurse who uplifted those around her. Reports suggest that the couple had been facing marital issues leading up to the heartbreaking event, which occurred on the evening of Sunday.