Look at his research, not his ridiculous links about the U.S. In particular the things he dug up about the guy who supposedly had drinks with Berg the night before he left the hotel, the business partner guy, and Berg's life in Oklahoma. If you know of a better resource for this story I'd like to see it.
RThat is in fact interesting but how do you know it is credible after he claims that the tip of an ear identifies the person photographed as "a US soldier"?