Actually, there's plenty of proof from the autopsy that Oswald could not possibly have acted alone. Witnesses describe Humes probing the back wound and finding no exit. That alone kills the lone nut scenario. Ask the Parkland and Bethesda witnesses where the head wound was. If the shooter from behind hit the president's head, we would see a violent motion forward, right? Instead, all the films show a violent "back and to the left" motion and a wound in the lower right portion of the President's head. That is totally incompatible with a head shot from behind. Sorry lone nutters, but if Oswald was the assassin, all the facts would come together easily. Instead, we have evidence of multiple shooters and trying to force Arlen Specter's boneheaded theory into the history books is an atrocity. The truth is much more complex. The fact that the real killers escaped is hard to accept. But these were professional killers who had a plan and executed it very well.