You are right, I think. The Dallas CBS producer is just a middle man -- the key question is where did the documents originate?
Per my post of 24 hrs ago, I still think Blather knows who created the docs, he knows they were fake, and [to keep from losing everything including quite possibly his Freedom...LOL] he will spill his guts sooner rather than later.
Ben Barnes gets my vote. (Who else would be from Texas? Molly Ivins???)