A one time he was just an ordinary man with an ordinary life, making costumes for the movies, until that day he lost everything and developed a mutated tape worm. It causes him to eat human flesh every second of the day. He moves to a new location, starts up a costume shop, and starts kidnapping people, taking them back to his shop, eating all their insides, and uses and sells their skin to unsuspecting customers. It'll be a holiday to remember.
Doctor O-Thug