You mean all the others with him that night were lying though they told the exact same stories while isolated and all passed lie detector tests...
They sure were good...and never made a nickel off it either...
I don't know, the Walton story is also one of my favorites, but I am telling you what I read. People don't only make up stories for money, they also do it for attention. Also, I'm afraid that UFO stories are so loved by the media they often fail to report facts that undermine the story line. Personally, I always thought the Betty/ Barney Hill story was brilliant and have always wanted to believe that one. For example, Norad records supposedly tracked a UFO landing and taking off at the time the Hills had their encounter.