I believe the last 2 points because I don't believe that credible military personnel with long and distinguished careers, would tarnish their reputations terribly for no apparent gain, especially near the end of their lives.
Check out Philip J Corso or Robert Salas, but there are , many, many others who have blown the whistle including Walter Haut the public affairs officer during the Roswell crash (and recovery).
I don't know, certain end of life seems to be the perfect opportunity to publish all that fantastic evidence that would mark the most important distinguishable moment for humanity as a whole so far.
