The Theory put forth by warren commission member Arlen Spector
The Single Bullet theory was introduced by the warren commission to explain the
second shot taken by oswald. It says The bullet enters the president "near the base of the back of President Kennedy's neck slightly to the right of his spine" clipping the trachea exiting the front of the presidents neck. Then enters Governer Connallys back hits a rib exits his chest enters his left wrist shatters his wrist exits and enters his left thigh.
THE SHOT
Former Marine, Pro wrestler, and Governor of Minnesota Jessie Ventura who had his own Conspiracy Theory show on TruTV attempt the shots the Warren Commission say Oswald made. Just like the test CBS news legendary Marine Carlos Hathcock (who once shot a man through his scope from a mile away) the Warren Commission its self and countless others the test was a failer and no one has been able to replicate the shots in the amount of time the Commission says Oswald did.
The Limousine
Moments after the final shots rang out the Presidential Limousine sped off to Parkland hospital where the President was read his last rights and pronounced dead. The Limousine was said to have been washed out by a CIA officer, this was never confirmed but there was a bucket seen sitting next to the limo. The limo was then flown back to Washington and disassembled and new parts put back on it. The original parts are long gone and with them the possibility of evidence being used from it to determine where the shots came from.
The Head Wound
The one peice of evidence that most people belive can not be destroyed are the wounds to the Presidents head, but there are theory's that when the President was being moved from Parkland hospital in dallas to Bethesda Naval Hospital in Marylan there was a secret pre aoutopsy that was held to change the presidents wounds to make them look like exit or entrie wounds to make the wounds fit the story that they wanted the american pubic to belive. Some who push for Oswald to be the "Lone Nut" have even got there stories mixed up sayin that they could see cerebellum. This would mean the back of his head would be blown out and that the shots came from the front.