The Air Force and Conrad struck a deal to keep the truth from the public for publicity reasons. This ought to be the headline: The Air Force agreed to protect a UFO lie for business reasons! But Redfern is doesn’t quite see that as the most important part of the story.
I’d also like to fault Redfern or failing to tell us where to find the files that contain this information. The declassified Air Force UFO files run into the thousands of pages, and a link to the correct set of documents would have been helpful.
Sadly, the Black Vault database of Project Blue Book was taken down after Ancestry.com asserted that it owns the copyright (!) to the Air Force’s UFO files, an impossibility since by law United States government files cannot be copyrighted. Fortunately, the searchable Project Blue Book Archive is still up and running (at least until Ancestry.com tells them they own government records, too).
If you’re curious, here are the links to the relevant files (pp. 195-201) and more here (pp. 680-684), which Redfern declined to provide, probably because they show that his article contains very little original reporting and background research beyond searching IMDB. He also seems to have missed some interesting sidelights: The editor of The Film Daily set off the whole chain of events by contacting the Air Force to try to figure out of Conrad’s press release about having UFO footage was true! So, in short: The media contacted the Air Force, and the Air Force and the Office of Special Investigations agreed to lie to the media and abet a hoax “because OSI had no interest in his picture, since he had not actually sighted any unconventional object in the sky.” Awesome!