Have you heard of this guy named Matt Sanchez? He was a Marine reservist who tried to make a name for himself by blasting the Columbia student body for being violently anti-military. Naturally, conservative media latched on to the story like leeches and it turned out that the guy was a former GAY porn star and gay escort.
He has re-invented as a journalist who reports from a military perspective, even though he has never really seen battle and has been a reservist his entire military career. He was under investigation for financial fraud and violating the "don't ask/don't tell" policy, but that was swept under the rug because he writes pro-right, pro-military propaganda.
He's the main guy that the Army is citing as a source debunking Beachamp's story.