The detective followed the officer and Waller to the Central Patrol headquarters, where Waller was handcuffed and shackled to the floor of an interview room.

Carroll was ordered by a supervisor to stay away but entered the room and began yelling. He asked who had broken into the car, threw Waller into a chair and then into a wall. He also punched Waller in the torso.

He admitted knowing that it was "wrong and against the law to do so, and knowing that it violated his oath as a police officer to uphold the laws …" his plea says.

That night, Carroll called Worrell and said he had injured his foot. Worrell realized the next day that it occurred while he assaulted Waller, her plea says.

She discussed it with an unspecified number of colleagues the next day. The group would later text with regret that another prosecutor might have heard who "would not cover for, joke about, or conceal information about a law enforcement officer unjustifiably beating up an individual in his custody," her plea says.

Carroll told Worrell and others in a conference call that he had thrown Waller against a wall, beat him, threw a chair at him and shoved his "pistol down the guy’s throat," Worrell’s plea says.