Constable Barry Bullock

Barry Bullock is a guy doing his job. He is a smart guy, unlike Adrian Diesel. Red possibly lost him his job by preventing Adrian from getting caught, which isn't fair considering Barry would have been promoted and paid more to feed his family but instead Adrian didn't keep his promise to Barry and Red forced Adrian to break it. Though it's possible Tom McGee was lying when he said Barry was fired, because there was criminal activity at the museum and Barry's backup call may have helped the police get closer.