The USPTO now allows people to comment on patent applications and provide evidence as to why they are invalid. Assuming this patent application actually exists (I could not find it with a quick records search), someone could submit it to patents.stackexchange.com and inform the examiner as to why it's got prior art.

By the way, making false claims to the patent office is a crime. If he claimed to the USPTO the same thing he's claiming to the rest of the world, he may now theoretically have serious legal liability.