Charlton Warren Discusses UNC's Defensive Secondary Ahead of Week One Posted Aug 24, 2023 When looking at last year's game film, UNC defensive backs coach Charlton Warren saw missed opportunities from the defense. Moving forward, the aim is to make the team experts on what to do and eliminate thinking as much as possible. Warren said having battle-tested veterans on the roster who can lead helps with the improvement down the line. (Inside Carolina)