Do you know the movie Infamous?
If children make accusations like that, people don't see a reason to doubt them. Especially if the accusations are explicit. Because hey, where else would they've got it from. They're kids after all.
Now, I can't say if he did it or not. He certainly was weird enough to may have done it, but that could also be the reason that he was picked for the scam, if it was one...
What's certain is that a great artist died with him. Even if you didn't like his work or him, you have to admit that. So R.I.P.