For anyone that is not familiar; I first saw this story written up by famous American UFO stalkers, investigating Meier's claims. They formed a group with famous photographic experts, and spent a lot of time and money investigating.
Once I had read Billy's interviews; I no longer questioned his veracity. He obviously had a life purpose and was very close to some of the personalities he was talking with on a regular basis.
So while there is no question in my own mind all this is real, and should be regarded as such; for yourself; you may want to take a few steps back and do some of the same investigation I did myself.