A Davison County corrections officer has been arrested for assaulting a female inmate while on duty. 29-year old Sergeant Isaac Tirrel is accused of assaulting the victim on December 8th as she was being booked into the Davison County Jail. The day after the incident, Tirrel was suspended by Sheriff Steve Harr. The case was then turned over to the South Dakota Division of Criminal Investigation. Following an investigation which included surveillance video and audio , a warrant was issued for Tirrel’s arrest. He is charged with simple assault. He turned himself in to authorities on Monday. Tirrel posted 1,000 dollars bond and was released. He has been terminated from his position at the jail.