By Jimmy Lee, Director of Public Affairs, Contra Costa County Office of the Sheriff
At about 12:47 AM today, a Deputy Sheriff was doing a room check at the Martinez Detention Facility (MDF) when he noticed an inmate was unresponsive in his bunk. The Deputy immediately called for medical assistance and started CPR.
Medical staff at MDF continued life-saving measures. An ambulance and the fire department responded to MDF. The inmate was later pronounced deceased. The inmate is identified as 45-year-old James Darryl Cooper of Vallejo. On January 18, 2018, he was booked into MDF on a warrant for domestic violence. He also had three arrest warrants from Solano County. His death appears to be medically related. An autopsy will be conducted to try to determine the cause of death.
The officer-involved protocol was initiated. Investigators from the Contra Costa County Office of the Sheriff and the DA’s Office are conducting an investigation into the death.