Roy Junior Mathes, 37, Rogersville, was indicted on one count of assault by the Hawkins County grand jury earlier this week, the Tennessee Bureau of Investigation announced in a news release.
The incident occurred Feb. 23. The inmate, Lloyd Gibson, 24, Johnson City, was being held for failing to appear in court on previous charges, and he was removed from his cell because of his involvement in a vandalism incident in the jail.
During the removal, Mathes pushed Gibson causing the inmate to strike his head against at least one jail door in the facility, the TBI said.
Mathes was booked into the Hawkins County Jail this morning.