Not to mention the supposed exit wound depicted in the McClelland sketch would require an entrance wound right in JFK's face.
Exactly. And believe it or not, one conspiracy nutter claimed that Governor Connally had a gun strapped to his ankle and fired the fatal shot, blowing out the back of JFK's head.
As enormous as some of these people describe the wound as being, which is "the whole back of his head blown off", there is no way a shot from the knoll could do that without blowing part of the left hemisphere of the brain out, damaging it as severely--or worse--than the right hemisphere was damaged. Ignore what Mrs. Kennedy said, ignore what Bobby Hargis said about the explosion on the head being on the right side, Bill and Gayle Newman, Abraham Zapruder, Marilyn Sitzman, Chuck Brehm said, but believe what people standing up the street further away say when they say they saw the back of the head blown off.