His past is his past. You can't escape that. Go out and speak to him, hopefully get the reports and make sure that the system treats him just like any other defendants -- fairly.
He said that he walked her out the bar at the end of the night. He's not hiding from that. He was doing his job and at the end of the night when they were closing his job was to make sure the bar was empty and he walked her out and that was the last he saw of her.