Scott Jacobs posts the evidence at The Jury Talks Back, in the form of a post lifted (with permission) from the NewsReal Blog.
Some of the evidence is weak, at least considered in isolation. For example, you can oppose the concept of date rape, or oppose lifetime sanctions against sex offenders, without being pro-sex offender. And this is even dicier, but it is possible to make jokes like the ones discussed in the post, for the shock value alone.
But when you put all that in context — with the references to “chilfs” (don’t ask), the admission on a gay teen forum to having sex with a 16-year-old (however legal in the given state), and so on — it paints a picture of a person who seems to have an interest in young boys as sex objects.
Whether that person is Frum’s protege Alex Knepper depends on whether someone is framing him in an expert manner or not. I’m inclined to believe it’s not a frame job.
Make up your mind for yourself — but before you click, be aware that there are relatively graphic images there. No child porn, of course — but not for the squeamish.
UPDATE: On his Facebook page, Knepper admits posting the picture of the two young naked men.