That's what I've been saying. I saw the tape and I now suspect there's more than one "version" floating around because on mine, I didn't see any blood on the floor, on the jumpsuit, spurting across the room, on the bad dudes' hands, and the face was clean as a whistle when it was placed on the body. Let me repeat that - THE FACE WAS CLEAN AS A WHISTLE WHEN IT WAS PLACED ON THE BODY. The only time I saw what might have been something that might have been blood was when the head was lifted into the air. Of course the "something" could have been skin, hair, or even a dust bunny but it was just a single something rather than a stream, spurt, or dripping blood. My theory, since I obviously wasn't there, is he was already dead and they thought later it'd be a great bit of Hollywood and bragging rights to add a beheading to the video.
An autopsy, if it were done, should have been able to confirm that (according to Quincy).