The retired police sergeant shot the deputy's wife and their daughter in a wealthy beachside home.

Ann Mannix, San Francisco's first female SWAT commander, and her daughter Katie were found dead in their Mill Valley home in a suspected murder-suicide.

A retired San Francisco police sergeant shot a deputy's wife and their daughter at home

Authorities have identified the deceased as Anne Mannix, 65, a former SWAT commander, her 24-year-old daughter, Kathy, and her husband, 68, a retired San Francisco police sergeant. Kevin Mannix.

A former San Francisco police deputy was killed alongside her daughter in an apparent murder-suicide by her husband, a retired police sergeant, the Marin County Sheriff's Office said.

Marin County Sheriff's Office Public Information Officer Miguel Almaguer said in a statement: "Preliminary investigations indicate three people have been killed by suicide." The suspect in the shooting is a man.

Later in a news conference, he specifically identified Kevin Mannix as the shooter and said he could not discuss the evidence found in the home.

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Retired San Francisco Police Deputy Chief Anne Mannix in a photo shared by the city's Police Officers Association. A former SWAT commander was shot to death in a murder-suicide on Sunday. (SFPOA)

Deputies responded to a 911 call at the family's Mill Valley home around 5 p.m. Sunday

The caller is said to have fled the residence safely but has only been identified as another occupant of the home. Deputies arrived and found three family members dead inside, officials said

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Katie Mannix's photo in an undated Facebook photo. The 24-year-old daughter of two retired San Francisco police officers was shot and killed by her father over the weekend in an apparent murder-suicide, authorities said. (Kathy Mannix/Facebook)

Autopsies on all three victims were scheduled for Tuesday.

"It is with deep sadness, shock and heavy hearts that we address the devastating news that came out of Marin County on Sunday evening," San Francisco Police Officers Association President Louis Wang said in a statement Monday. "The tragic loss of retired Deputy Ann Mannix, her daughter Katie, and retired Sergeant Kevin Mannix in a suspected murder-suicide has shaken our entire SFPD family. There are no words that can fully convey the depth of this tragedy, nor are there simple answers to the painful questions we are all asking."

The family's home on Strawberry Circle in the Bay Area's Mill Valley, image on Google Maps. (Google Maps)

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Ann Mannix was the first woman to join and later lead the SWAT team, Wong said. He was also an advocate of youth sports for his children and others and was on the board of directors of the city's police activities league.

"Anne had a lot of talent, and a lot," said Bodello Barberini, a former San Francisco police officer and Bay Area columnist who knew the couple.

San Francisco police did not immediately respond to a request for comment.

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