Shortly after 7:30 a.m., on Friday, July 18, 2025, an explosion occurred at the Los Angeles Co. Sheriff’s Department’s Biscailuz Training Facility in East Los Angeles where, tragically, three Detectives lost their lives. The incident transpired in the parking lot of the Special Enforcement Bureau at the facility. The Detectives were part of LASD’s Arson Explosives Detail, and officials reported that it appeared work was being done to render a device safe before it exploded. 

Detective William Osborn graduated from the deputy sheriff Academy Class 278 in February 1992 before being assigned to Men’s Central Jail. He then transferred to Pico Rivera Station in 1998 as a patrol Deputy. He transferred to Industry Station in 2001 and promoted to the rank of Detective, where he received commendations for his work recovering stolen vehicles. After working as a detective for over a decade, handling over a hundred cases each year, Detective Osborn transferred to Training Bureau as an Emergency Vehicle Operations Center Instructor in 2016. Yet his love for investigations drew him back to detectives. Detective Osborn later joined Special Enforcement Bureau as an Arson and Explosive Investigator in 2019. As an Arson investigator, he handled cases involving high dollar loss fires in residential properties, as well as fires involving the loss of life. He was a peer leader and took on the role of mentoring newly assigned investigators. He was described as “one of tenured bomb technicians regularly relied upon when faced with a new challenge. He has broad range of experience and could be relied upon to provide relevant insight on broad range of subjects.”

Also lost in the line of duty were Detectives Joshua Kelley-Eklund and Victor Lemus

This incident represents the largest loss of life for the LASD since 1857.