Except for his confession on Opra there is no evidence. Confessions usually are enough for a conviction.
Does anyone really give a damn?
I can't imagine why anyone other than the other competitors would.

I have no faith in human perfectability. I think that human exertion will have no appreciable effect upon humanity. Man is now only more active - not more happy - nor more wise, than he was 6000 years ago. Edgar Allan Poe