Interestingly, the Surgeon(Robert McClelland ) who tried to save both JFk and Oswald's life died a few months ago, his obituary in the economist is an interesting read:
> The neck wound might have been entry or exit, but the back of the head clearly showed a huge exit wound; so the first bullet probably came from the back, and the second from the front, from different gunmen.
also from the same article:
>Several other aspects went on troubling him. There was no post-mortem in Texas, against state law; the body went at once to Bethesda. He was shown autopsy pictures at the National Archives in which the exit wound was covered up.