The Georgia Bureau of Investigation charged a former Hall County jailer on Thursday with striking a handcuffed inmate last month.David Pirkle, 24, of Flowery Branch was arrested Thursday morning and charged with simple battery and violation of oath of office. His bond was set at $10,000.Pirkle was fired Monday after an internal investigation of the Dec. 30 incident in which the Hall County Sheriff’s Office reported he struck the handcuffed inmate “without due cause.” Pirkle was hired in August 2011 and had been on paid administrative leave during the investigation.“As I said previously, the vast majority of our officers do a tremendous job,” Sheriff Gerald Couch said in a news release.