MARTINEZ -- A Pleasanton man who attempted suicide at the Martinez Detention Facility Thursday afternoon died of his injuries at a local hospital Friday, a sheriff's spokesman said.

A sheriff's deputy found the 21-year-old Pleasanton man unconscious in a small room in the jail's intake area at 2:54 p.m., the day after he was arrested in San Ramon on weapons charges and suspicion of a probation violation and resisting arrest, Contra Costa County Sheriff's spokesman Jimmy Lee said. The man, who had been at the facility less than 16 hours, had not yet been issued a cell when he tried to asphyxiate himself.

Medical staff at the jail tried to save his life while fire and ambulance were called, and he was taken to the Contra Costa Regional Medical Center in Martinez, Lee said. The man was pronounced dead in the intensive care unit the next day.

An autopsy performed Monday indicated the man died of asphyxia, and the coroner ruled the death a suicide, Lee said.

According to Lee, the intake area is a busy area of the jail, with multiple rooms. He said a "large number" of deputies were in the intake area at the time. Lee would not say whether anyone else was in the same room with the suspect when he tried to kill himself.

Per Sheriff's office protocol, the death will be jointly investigated by the Contra Costa County Office of the Sheriff and the District Attorney's Office.


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Contact Erin Ivie at eivie@bayareanewsgroup.com. Follow her at Twitter.com/erin_ivie.