New coordinator Geoff Collins challenges UNC's defense to be more aggressive Posted Aug 28, 2024 Senior linebacker Power Echols said he saw new UNC defensive coordinator Geoff Collins’ vision after witnessing the energy the defense had in its first practice. Nicknamed the "Minister of Mayhem," Collins wants to make UNC’s defense wreak havoc. Graduate defensive end Kaimon Rucker said the coach is setting up everyone to be more aggressive. (Daily Tar Heel)