August 12, 2025

USA: 44yo Sonoma County Sheriff's Deputy Killed 38yo Ex-Girlfriend Who Was A Sonoma County Sheriff's Detention Specialist And Mother Of His 3 Children. He Killed Himself During Standoff.

🚨NO WHITE SUPREMACISTS INVOLVED🚨

🚨NO ISLAMIC JIHADISTS INVOLVED🚨
KTVU FOX 2 San Francisco published August 11, 2025: Sonoma County sheriff's deputy kills ex-girlfriend, then self. Deputy Jeremy Lyle of the Sonoma County sheriff's office allegedly shot and killed his ex before killing himself during standoff. The former couple leave behind three children.

KTVU2 Fox News, Santa Rosa, CA local
written by Henry Lee and KTVU Staff
Monday August 11, 2025

SANTA ROSA, Calif. - An off-duty Sonoma County sheriff's deputy killed his ex-girlfriend and then himself in an unusual tragedy that has shocked the entire department, authorities said on Monday.

In a statement on Facebook, the sheriff said they were "grieving an unimaginable loss," when Deputy Jeremy Lyle, 44, fatally shot his former partner, sheriff's detention specialist Mari Bonnici, 38, on Sunday before taking his own life.

Woman handed baby and told his mother was hurt

What we know: Santa Rosa police said that their officers were sent to the 4600 block of Quigg Drive about 7 p.m. after a woman called 911 to say Lyle had handed her an 8-month-old boy and said the infant's mother "was hurt badly" and that Lyle drove off in a truck, said Santa Rosa police Sgt. Patricia Seffens.

When officers went there, they found Bonnici dead on the couch with at least one gunshot wound, Santa Rosa police said.

Police also found two 16-month-old twin girls in the back bedroom of the home.

None of the three children were injured and are being cared for by relatives, police said. Lyle and Bonnici are the parents of all three children, authorities said.

Off-duty deputy then drove to coroner's office

What they're saying: Then, police were alerted to the fact that Lyle had driven his personal truck to the parking lot of the Sonoma County coroner's office at 3336 Chanate Road.

Lyle was holding a gun in the back of his truck and wouldn't put it down, authorities said.

The SWAT team arrived, and he became engaged in a standoff for many hours, the sheriff's office said.

The standoff ended at 2 a.m. Monday, when he died from a self-inflicted gunshot, Santa Rosa police said.

No specific motive was given for either death, other than domestic violence. There were no previous reports of domestic violence on record for this couple, however, Santa Rosa police said. KTVU has learned Bonnici filed for dissolution of their domestic partnership in June.

"This tragic event is particularly shocking because it involves a law enforcement officer," Sonoma County Sheriff's Sgt. Juan Valencia said. "We recognize the profound shock and concern that this incident brings to our community. Both the Sheriff's Office and the community place immense trust in those who are dedicated to serving and protecting. No level of training or experience can fully prepare us for such a tragedy."

Valencia said the office extends its deepest condolences to Bonnici's family and then asked for privacy on her behalf.

He added that members of the sheriff's office are grieving and trying to "navigate this heartbreaking time."

Lyle was hired in March 2015 and had been serving as a resident deputy in Timber Cove since October 2019.

Anyone experiencing domestic violence in Sonoma County can access support through the Family Justice Center of Sonoma County and the YWCA Sonoma County. The Family Justice Center, located at 2755 Mendocino Avenue, Suite 100, in Santa Rosa, or by calling 707-565-8255. The YWCA Sonoma County provides the region’s only 24/7 domestic violence crisis hotline and operates a safe house shelter, trauma-informed counseling, and support groups for individuals and families. Their office is located at 811 Third Street in Santa Rosa, and their crisis hotline is 707-546-1234.

This is the ninth homicide and third murder-suicide in the city of Santa Rosa in 2025.

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