He is not a "random pervert," but a psycho who is facinated by child murder stories. He wrote a term paper in college about the JonBonnett murder, and his prof told him he should write a book. He has spoken with many people about the murder, including JonBonnet's grandparents.
The guy is a nutjob, and I'm sure that a prision in Thailand is not a good place to be....we'll have to wait and see what else comes out of his mouth.