Believe it or not, some criminals don't like people that prey on kids. He's going to know how those kids felt.
The only friend he's going to have in the joint is either the chaplain or the shrink, and they take on that role only because it's part of their job.
I have a friend that was in the damage path of the May 3, 99 tornado. His family found a shoebox full of poloroids of a nude woman in the debris. We had commented how she had probably told him "But what if anyone else ever sees them?" and he replies "Nobody will see them, I'll put them up here in the closet..."