A Waterloo police officer is charged with assault in an altercation with a motorist in Waterloo.

Lt. Corbin Payne is charged with assault causing bodily injury. According to court documents the incident happened on June 12th but it does not give any other details of the incident. It is not clear if Lt. Payne was on duty at the time.

The Associated Press reports according to court documents, Lt. Payne said another driver cut off the car he was riding in on June 12 in Waterloo. He then struck the other vehicle and grabbed the driver.

Waterloo police chief Dan Trelka said the Black hawk County Sheriff's Office investigated the case to avoid any conflict but his department is conducting an internal investigation as well.

"I commend the professionalism of the on duty Waterloo officers that responded to this," Trelka said in an email to KCRG-TV9.

The Dubuque County Attorney's Office filed the charge against Lt. Payne in Black Hawk County Court on Tuesday to avoid any conflict of interest.

Lt. Payne is a 20-year veteran with Waterloo police and supervises the Tri-County Drug Enforcement Task Force, according to the Waterloo Police Department website. He has also served as Watch Commander, supervisor of the Citizens Response Unit and the tactical unit.

A booking photo was not available.