Alejandro Diaz, a 45-year-old off-duty Los Angeles County Sheriff’s Deputy, was fatally shot by police officers at Sierra Lakes Golf Club in Fontana on August 15, 2023. The incident began after Diaz’s wife reported that he had fired a gun inside their home. Diaz then went to the golf course with two firearms and was found sitting near the putting green.

Officers say Diaz failed to comply with several verbal commands and raised a gun toward them, and they opened fire; Diaz was pronounced dead at the scene. Witnesses described a chaotic scene and reported that Diaz had fired indiscriminately, frightening golfers and nearby residents. The San Bernardino County Sheriff’s Department is investigating the Fontana Police Department’s use of lethal force.

Investigators found Diaz was experiencing a mental health crisis at the time. No arrests have been made and the shooting is being treated as a law enforcement-involved shooting.