Prosecutors charged former detention officer at the Tulsa County Jail with a misdemeanor in connection a fight between inmates last summer.
Marc Charles Moncrief faces a charge of willful neglect to perform duty.
Moncrief was fired on July 15, 2016. The sheriff's office said it confirmed reports from an inmate that Moncrief had allowed dozens of inmates under his supervision to engage in a fight.
The sheriff's office said security video from July 9, 2016, proved Moncrief failed to intervene when a fight broke out in the recreation yard. Moncrief never reported the fight, according to the office.
No serious injuries were reported as a result of the fight.