Although it has been reported in a number of books (including my own Body Snatchers in the Desert) that the FBI conducted an investigation - in 1988 - of the infamous Majestic 12 documents, much less well known is the fact that the FBI was tasked with looking into MJ12 again - in 1991.
The 1991 files reveal that, somewhat oddly, on the morning of 18 October 1991 a man (whose name is deleted from the relevant FBI documents that have been declassified via the terms of the Freedom of Information Act) who lived and worked in Salt Lake City, Utah had been walking "through the lobby of his place of employment" when he found copies of the MJ12 documents "lying on the lobby floor."
His response: he contacted the FBI.
As was the case in 1988, the FBI began asking questions - on this occasion, with the Department of Defense - as it sought to get the answers. As in 1988, the FBI was informed that the documents were utterly bogus.
Rather tellingly, a comment on one of the internal FBI documents (that is now declassified) states: "The fact that this Airtel is dated on Halloween day is purely coincidental; it could have been worse and dated on the first of April."