Check out his reaction around 1:12:49 when they're asking about a second man with him at the time of the assassination. I buy almost the entire story, but not that part. I think he's protecting someone. More on that later. That's the most obvious dishonest body language I noticed in the entire interview. He has a couple tells (itching nose with left hand: example at @1:01:40, blink with a slight eye-bob downwards: example @1:54:00), but I feel these are moments when he is omitting/transposing bits of the story, rather than fabricating them. His eye movements during recall are pretty consistently up and to his right side. Take note of his glances to his center-left. I feel this is him checking the hallway through the window, but it might also be a tell.

He goes on to (@1:33:30) talk about someone that showed up at his hotel after the fact looking for help disposing of a murder weapon. His comments about this party are at 1:34:30. "I've never given up anybody in my life. I'm not gonna put anyone in prison." (1:35:01) He also consistently talks about Oswald as support for the shooter, rather than the shooter himself.

My theory is that James Files was support/spotter for the grassy knoll shooter, much like Oswald was for the shooter in the building. The knoll shooter was probably someone he knew personally, that is still alive as of this recording, and is probably someone Files cared for on a personal level. His tells during his story all seem to center around the moments leading up to the final shot, and his trip back to the getaway vehicle. All times when the theoretical 2nd party would have been with him.

There's more to this story than he's telling, but I doubt its going to come out while the unnamed parties are still alive. If Files dies before these other parties, I suspect he will not leave any new info behind. He seems to feel strongly about protecting those still alive, and I don't think it's because he fears for his own life.

I just wAtched that whole thing. He says he took the shot from the grassy knoll.

So James Files is Ted Cruz's Dad?

This man seems pretty convincing to me. I am inclined to believe the things that he is saying here.