In the movie "Setup",
When Sonny and Petey visit their friend (with the guns and drugs), Petey starts playing around with guns. Later, while Sonny and his friend were talking, they hear a shot and finds that Petey is dead and blood is splattered everywhere.
So did Petey shoot himself or did someone else shoot him? Petey is like a mob-boss's right-hand man. So could he been dumb enough to shoot himself? If someone else shot him, who was that?