Morgan's taken aback by his girlfriend Savannah's dedication to her job - which Garcia points out is exactly like his.  Meanwhile, the BAU investigates the shooting of four people in a diner, who were all murdered by a young teen before an off-duty cop managed to shoot him. Shortly afterward, another teen performs a suicide killing by blowing up his own car in the middle of an intersection.  The BAU manages to capture another teen prior to him getting a chance to shoot more people, after which they learn the children were all kidnapped and later brainwashed by their captor.  Eventually they determine that a disgraced cop is responsible for all of it: he had used them in an attempt to kill those he deemed responsible for the loss of his job in the Chicago PD.  The BAU captures him at the home of his former partner.