A 30-year-old inmate at the U.S. penitentiary in Jonesville, Virginia was found dead in the gymnasium according to the U.S. Department of Justice.
Demetrius Hall was serving a 152-month sentence for armed assault on a police officer and armed robbery.
Staff responded to the gym and found Hall unresponsive. He was later pronounced dead at a local hospital.
An autopsy will be performed to determine the cause of death.
Foul play is not suspected.