Samuel Cooper is a fictional character on the CBS crime drama Criminal Minds: Suspect Behavior, portrayed by Forest Whitaker. He is the Unit Chief within the FBI's Behavioral Analysis Unit in Quantico, Virginia, who works with a non-traditional team called Red Cells. He first appeared in the Criminal Minds episode The Fight in the fifth season.David Rossi from Criminal Minds says that he knew Cooper for twenty years.E518 It is also quite clear that he and Aaron Hotchner, also from Criminal Minds, have a past as well, but the matter remains moot. Wikipedia