Oklahoma paid $175,000 to settle claims that its highway patrol used excessive force against Pearl Pearson, who sued after being injured during a 2014 traffic stop when he was unable to communicate or follow verbal directions. He was beaten "to a pulp," his lawyer Derek Burch said.

The August incident is under investigation by the police department's internal affairs division and is being reviewed by the Maricopa County Attorney's Office.

The officers, who are under investigation, “remain in their assigned duties” the Phoenix Police Department tells PEOPLE