Well, he was one of the most successful journalists of his age; he previously destroyed a former CIA general with his writings; he claimed one year ago to have lots of sources in governmental agencies ( http://www.reddit.com/r/politics/comments/uaha0/iam_michael_... ); he recently wrote messages saying he was onto something big re: NSA; he was, basically, at the apex of his career. Why would he go "yeah, let's see how fast this car can go now!" all of a sudden? I am not saying he was killed but I would not find hard at all to believe TBH.