Responding to a robbery complaint, Webster and Gillis arrive at the building and enter into a criminal-chase. Thinking he is being fired at, Gillis returns gunshots. He strikes one of the criminals, David Palmer, only to find out that the teen is unarmed and now gravely injured. Gillis is overcome with guilt. An inquest is scheduled until the teen dies on the operating table. Later that evening, Gillis receives the first of several anonymous phone calls informing him that he did not kill David Palmer; the Squad, consequently, begins further investigation.