The Warren Commission 'concluded' that three shots were fired at the motorcade, and all three shots originated from the Texas School Book Depository Building, mainly due to the discovery of three spent shells on the sixth floor - then it mused that perhaps only two shots were fired and the third shell was used as a chamber plug.

So which is it, Earl? If there were three shots, but only two fired from the Texas School Book Depository Building, then shouldn't we be looking for another shooter?