Rebel in Town (1956)

Bedloe Mason (J. Carrol Naish) and his four sons ride into an Arizona outpost after robbing a bank. When they hear a gun go off behind them, one son immediately turns around and shoots to kill. But his victim turns out to be a young boy with a toy gun, so the Masons hightail it out of town, save for Bedloe's son Gray (Ben Cooper), who feels guilty and stays to see the kid buried. Yet Gray's presence only stirs up more trouble as the child's father, John (John Payne), looks for violent revenge.