Santa Rosa, California — The Sonoma County community is grappling with shock and grief after a tragic incident claimed the lives of Mari Bonnici, 48, and her former husband, Jeremy Lyle, 52, in what authorities describe as a murder–suicide.
According to the Santa Rosa Police Department, the events unfolded on the evening of August 10, when officers were dispatched to a home in the city’s west side after multiple reports of gunshots. Upon arrival, officers found two individuals—later identified as Bonnici and Lyle—unresponsive with gunshot wounds. Paramedics confirmed both were deceased at the scene.
Investigators say preliminary evidence indicates that Lyle, an off-duty deputy with the Sonoma County Sheriff’s Office, fatally shot Bonnici before turning the gun on himself. The firearm believed to have been used in the shooting was recovered at the scene. Detectives believe the incident stemmed from a domestic dispute, though the exact motive remains under investigation.
Authorities revealed that Lyle and Bonnici were previously married but had divorced several years ago. Sources familiar with the case say there had been ongoing tensions between the two, though it is unclear if there were prior reports of threats or violence.
“This is a heartbreaking and deeply troubling case,” Santa Rosa Police Chief John Cregan said in a statement. “Our thoughts are with the family, friends, and colleagues affected by this tragedy. Domestic violence has far-reaching consequences, and this case underscores the importance of early intervention and support.”
The Sonoma County Sheriff’s Office confirmed Lyle’s employment history, stating he had served as a deputy for more than two decades. In a brief press release, Sheriff Eddie Engram expressed condolences to the families involved and noted that grief counseling is being offered to department staff. “This is an extraordinarily difficult time for our agency,” Engram said. “We will be cooperating fully with the Santa Rosa Police Department in their investigation.”
Friends and neighbors described Bonnici as a warm, caring woman who was devoted to her work and community. “Mari was always smiling, always checking in on people,” said longtime neighbor Carla Jimenez. “It’s devastating to think her life ended this way.”
Community advocates are using the tragedy to highlight the ongoing dangers of intimate partner violence, even in relationships that have formally ended. Local organizations, such as the YWCA Sonoma County, are encouraging anyone experiencing threats, harassment, or abuse to reach out for help.
Police have stated there is no ongoing threat to the public and emphasized that the case is being handled as an isolated incident. Autopsies for both Bonnici and Lyle are scheduled later this week.
Anyone with additional information is urged to contact the Santa Rosa Police Department’s Violent Crimes Investigations Unit.
