There IS evidence that pedophiles can be rehabilitated. The positive outcome usually occurs when the person is caught and punished/rehabilitated early on in their adult lives.

I'm on my phone right now so can't pull up a bunch of stuff. But I'm sure a few minutes with Google Scholar can show you what you need.

I mean, I absolutely believe in second chances, and believe that people can change. Did he do something awful? Absolutely. But if he has served his time as the law sees fit, he deserves a shot to live his life, too.