I found the comment mentioning paranoid schizophrenia really strange, too. But I also know that paranoid schizophrenia is extremely difficult to treat to a level that results in normalcy, so I have serious doubts about him having it. But the fact that it was brought up did pique my interest. I know that bipolar disorder can have schizoid features, and that IS something that's very treatable, so...I did consider if that might be a possibility.
Another strange thing--a photo of a "missing" flyer showed up on Facebook three weeks after he went missing. I have no idea who made it or where it came from originally, but there was practically no information on it. It had a picture, his name, his height and weight, and a contact number. That was it. No last seen, what he was wearing, nothing. That evening, the first news reports also showed up online.
Three weeks is a long time.