YMMV / Creature with the Atom Brain

• Complete Monster: Frank Buchanan is a gangster who was deported for his crimes. When he returns to the country, he funds experiments to resurrect the dead and uses the zombies as his slaves to kill his prosecutor and his associates who sold him out by beating them to death with their superhuman strength. When two of his victims are placed in protective custody, Buchanan has his zombies go on a killing spree, slaughtering such varied targets as a factory, a train and a school bus before he captures a cop and zombifies him to kill his last two targets. The police finally manage to catch up to Buchanan, so he kills the scientist who made the zombies and orders them to massacre the officers.