When he arrived at the base, he was apparently told by a nurse (who later disappeared) that a UFO had crashed and that small humanoid extraterrestrials had been recovered. But Haut is the only one of the original participants to claim to have seen alien bodies. 
Haut's affidavit talks about a high-level meeting he attended with base commander Col William Blanchard and the Commander of the Eighth Army Air Force, Gen Roger Ramey. Haut states that at this meeting, pieces of wreckage were handed around for participants to touch, with nobody able to identify the material. 
He says the press release was issued because locals were already aware of the crash site, but in fact there had been a second crash site, where more debris from the craft had fallen. The plan was that an announcement acknowledging the first site, which had been discovered by a rancher, would divert attention from the second and more important location. "
From:  
Paranormal Hunter: Roswell officer's amazing deathbed admission raises possibility that aliens DID visit
 For that man to go to all that trouble, he must have felt very strongly about the "Cover up".
 
Cheers,