Stop being so antagonistic Toast.
I was there too, and I've had a similar thing happen to me. He spawned as a traitor, saw who his buddies were, then was suddenly switched to detective, knowing who the traitors were.
He shouldn't have killed them all having that knowledge, and I've already talked to him about that and explained that in a situation where he unfairly finds out who the traitors are, the best thing to do is just sit the round out.