I don't know why I suspect DD, I just can't seem to shake it off, if it helps anyone any, I've felt this way about him since the first book but like I said, I am prone to a suspiscious nature! It's just his constant inability to warn Harry or help Harry. Like in Chamber of Secrets, he knew what was going to happen and prepared Fawkes to help Harry (or so I believe), but yet, why didn't he warn Harry of who he'd be facing in the first place, especially as he knew of the Chamber of Secrets, the monster within and who the heir to Slytherin was!