He is Guilty.
Guilty of being a Whack Job.
What I think people need to realize is the following:
The guy is a pedophile.
The guy is obsessed with the murders of young girls.
The guy purposely takes jobs that put himself near children.
Put those three together and you have a deadly combination. Does that mean he killed JonBenet? No. But it does mean that it's good that they caught this guy when they did regardless of his guilt in one particular case, because if he hasn't already killed, he's very likely to do so in the near future.
It sickens me that his family is treating him like a saint when we already know so much about his past. (The child porn found on his computer, the revocation of his teaching credentials in more than one state, what he did overseas, etc.)