Daniel Pierce The main antagonist of season 1. Daniel Pierce Employment - head of the Special Unit of the FBI Romantic Relationships - Congresswoman Vanessa Whitaker Killed By Michael Pierce was recruited into the Special Unit of the FBI by the leader of the group at that time, Daniel Sommers. When Sommers was killed, the SU was taken over by John Stephens, but apparently Pierce wasn't impressed by Stephens' leadership because he staged a coup and put Stephens into custody and took over the unit.