Investigators say Matthew Hall was found unresponsive in his cell at David L. Moss Tuesday.
Officers say Hall was found on the floor with a sheet tied around his neck.
Paramedics were able to resuscitate him and take him to the hospital.
Hall is accused of driving David Ware away from a scene near 21st and Garnett last week after two officers were shot.
Sgt. Craig Johnson was killed. Officer Aurash Zarkeshan is still in the hospital.
Cox Media Group