Harry Potter and the Philosopher's Stone/Harry Potter and the Sorcerer's Stone - A Forgotten Bad Wizard
After Harry has met Malfoy for the first time (at Madam Malkin's robe shop in Diagon Alley), Malfoy talks about the Hogwarts houses and Harry is naturally completely mystified. He asks Hagrid about the houses, and when Hagrid gets to Slytherin, he says something like "There wasn't a single witch or wizard who went bad that wasn't in Slytherin." Well, what about Pettigrew? He was definitely a bad wizard, and he was in Gryffindor! The only excuse to this mistake would be that Hagrid, like all other witches and wizards, think that Pettigrew is dead. Well then what about Black? Every witch and wizard thinks that Black was a big supporter of Voldemort! Please let me know what you think.
-Sarah