You can get experts to prove that UFO's exist, ghosts walk among us, the Loch Ness Monster is real along with cousins Big Foot and Yeti, and that there was a consipiracy to kill JFK.   

The only real truth is that none of us know, and we are fooling ourselves to think that the goverment is holding information that will clear this up once and for all. There is no definitive evidence that proves that Oswald didn't do it. The only fact that we have to face is that a lot of people are making a living off of all these consipiracy theories.   We will never know.