Fake But Accurate?

"In accordance with longstanding journalistic ethics, CBS News is not prepared to reveal its confidential sources or the method by which 60 MINUTES Wednesday received the documents."

Why not? The documnets are obviously fraudulent. CBS News has been badly tarnished as a result. I would think that someone at CBS or at Viacom would be ready to lynch whoever did this to CBS News. Any ethical obligation to the source, as emailer CM notes below, is forfeited if the documents are fraudulent.

Emailer CM is right about this. The identity of the source is the hinge of the story.