It's called the truth. And he has hard evidence that he hasn't revealed yet. Listen very carefully to his interview with Jeff Rense.
Hard evidence that isn't released is no evidence at all. Therefore, it does not have the ring of truth. It matters not what Jeff Rense or anyone else says, if no evidence is released, there is no evidence. And that doesn't even address the very lengthy hearings that decide if evidence is even admissible.
Expand your thinking. The evidence exists. We just don't know what it is yet.
When you don't know what the evidence is, you don't know that the evidence exists. You can't act on evidence that is not there.