On July 19, 2025, at approximately 7:30 a.m., three detectives from the Los Angeles County Sheriff's Office were killed in the line of of duty during a training session. All three detectives died from an explosion at the Biscailuz Center Academy Training facility.
Detective Osborn was one of those detectives. He had served with the Los Angeles County Sheriff's Department for 33 years, assigned to the Special Enforcement Bureau and was 58-years-old.
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 was 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.”
He is survived by his wife, who is also a detective with the Los Angeles County Sheriff's Department, four sons, and two daughters. His wife, Detective Shannon Rincon, stated, "Beyond the uniform and beyond the badge, he was mine. He was my partner, my best friend, my safe place and my whole world - my everything,"
Our prayers and condolences to Detective Osborne's family and partners with the Los Angeles County Sheriff's Office.
