"You think I did this?" Stephen gave a half-hearted laugh, as if he wasn't quite sure of Draco was joking or not. "How on earth would I have done it? I don't know any spells like that. I never went near a Death Eater. If anything you're more likely to have done it than I!"
As of to prove a point Stephen pushed back both his sleeves and exposed his forearms for examination. "I don't know what you want to believe about me but I wouldn't even know where to start!"