# Family demons led to SFPD leader's murder-suicide

> SFPD deputy chief and daughter killed by husband who then died by suicide, says brother.
- Title: Family demons led to SFPD leader's murder-suicide | Shortify
- Summary: SFPD deputy chief and daughter killed by husband who then died by suicide, says brother. Kevin Mannix killed his wife and 24-year-old daughter before dying…
- Keywords: sfpd, ann mannix, kevin mannix, murder-suicide, family demons, san francisco police department, marin county, katherine mannix, news, local, Family, demons
- Source: The San Francisco Standard — https://sfstandard.com/2026/10/16/sfpd-officer-mannix-murder-suicide
- Published: 2026-10-16T23:02:46+00:00
- Read time: 1 min
- Topics: sfpd, ann mannix, kevin mannix, murder-suicide, family demons, san francisco police department, marin county, katherine mannix, news, local
## Family demons led to killing
Ann Mannix's brother says Kevin Mannix's troubled childhood with violence and suicide led to the murder-suicide.

> This behavior, while growing in intensity … was around for a long time
## Kevin Mannix's troubled youth
Kevin Mannix's father died young, mother had severe mental health issues, and he was sent to orphanages.
## Family violence and suicide
One brother died by suicide, another was killed in a robbery, and a family member killed his wife.
## Kevin Mannix's career
Kevin Mannix joined SFPD in 1991 after a stint as a sheriff's deputy and worked until retiring in 2018.
## Ann Mannix's career
Ann Mannix joined SFPD in 1986 and became the first woman to lead SWAT team after 35 years.
## Contrasting careers
Ann Mannix was a celebrated leader while Kevin Mannix worked quietly in the background.
## Kevin Mannix's mental health
Kevin Mannix had memory issues and was evaluated for mental fitness before retiring in 2018.
## Family legacy
Kevin Mannix's family experienced multiple premature deaths and violence throughout his childhood.
## SFPD leadership
Ann Mannix was promoted to deputy chief in 2018 and retired in 2021 after 35 years with SFPD.
## Kevin Mannix's nickname
Kevin Mannix was nicknamed 'Background Mannix' for conducting background checks for new hires.
## Family conflict
Kevin Mannix said to his friend, 'I got me an amazing lady. Nobody’s taking her from me'.

> I got me an amazing lady. Nobody’s taking her from me
## Murder-suicide details
Kevin Mannix killed his wife and 24-year-old daughter before turning the gun on himself.
## Aftermath
SFPD officers praised Ann Mannix while little light was shed on Kevin Mannix's career.
## Memorial planned
A memorial for Ann Mannix is planned for Oct. 23 at St. Ignatius Church.
## Key takeaway

Kevin Mannix killed his wife and 24-year-old daughter before dying by suicide, according to Ann Mannix's brother.