Ennui said:I figured he wasn't because that's already been done with the diary and I didn't think Rowling would do it again. I thought at first it could by Harry's mother but then I couldn't justify that so I was up in the air. I knew it was a bad thing though.
I thought it was Lily too, must have been the potions thing. I never suspected Snape strangely enough. Sectumsempra seems like a cool hex though...