I doubt it. The most likley explanation is they have squat and are too embarrassed to admit it.
It is not different from every single other occaisions when some birther claimed to have irrefuteable proof of something.
Sorry, but this a crank-ish faither excuse. You don't promote something on a live radio show and then half an hour later decide you don't have anything or are too embarrassed. Radio people do hours of prep time before they go on the air. If they were vetting this story, it would have been done off the air and never would have been promoted.