What hoax?? It's on the FBI website.
Of course, the real issue is the fact that it isn't stated that it has anything to do with Roswell. Also, the bodies sound like test dummies, and the radar stuff is 3rd hand info from an "informant" - most probably con-artist, Silas Newton, or his partner, whats-his-face.
The "investigator from the Air Forces" part is the only thing that makes it interesting. But did the SA personally interview the "investigator from the Air Forces," or is that just more third-hand nonsense from con-artist Newton.. err, I mean, this unnamed informant.