Casket Switch - Arrived Body Bag Zipped, Not plastic liner
Paul O'Conner was in Autopsy team at Bethesda and was given permission to speak by the Military who had all take an oath and sign document to not to speak about the autopsy. This permission was given at the second hearings years after the Warren Commission. He as well testified to the President "had no brain... less than a handful" - but left Parkland Hospital Dallas as Doctors testifying "about one third of his brain had been blown out". The two caskets are documented. The casket switch and alterations occurred in flight from Dallas.
Here in this Video again Paul O'Conner giving interview explains JFK arrival to autopsy room and plainly states JFK was in a "body bag zipped" which he being in the military and autopsy worker is describing an actual body bag. Some one (s) tried to say JFK was in the "plastic liner" from Parkland. This is not true. Body bag is a medical and military term for the body bag as all America saw almost every night on television reports from the Viet Nam War - the many dead soldiers in zipped closed body bags. This video starts at 6Minutes/33seconds into the clip to this exact interview about the two caskets and zipped body bag...
http://youtu.be/Fj0743iertU?t=6m33s