Paul - NOVA on PBS had a special last week going over the ballistic and forensic evidence from the assassination. I am completely convinced that all the shots came from one rifle after watching the program. You can watch Cold Case JFK online.
That PBS special was excellent. So was the one on History that debunked all the "conspiracy theories"; just because Castro, Organized Crime, Cuban Exiles, et al. may
have had motive "proves" absolutely nothing.
On our first visit to Dallas in 2005 we went to visit the Sixth Floor Museum. Driving down Elm for the first time I remember how surprised I was at the steepness of its decline as it goes the short distance through Dealey Plaza from Houston down to the triple overpass. And, the "whole scene" is much
smaller in reality than it appears to be on film.
Looking down from Oswald's nest, believe me, anyone who has hunted would recognize the shots as being ridiculously easy - especially with a 4x scope
on a sighted-in carbine, even a POS with bolt action. Oswald missed with his first shot; researchers believe it deflected off the traffic light at Elm & Houston; the bullet hit a curb down by the triple overpass and a man standing there was nicked by either bullet or concrete shrapnel. Six seconds later Oswald's second shot hit the President in the back, the final shot was 5.8 seconds later; "time" was not an issue.
Remember the big deal Oliver Stone made in his JFK
movie about the fact that (whomever) didn't take the "easy shots" as Kennedy came toward him on Houston? Total B.S.! For Houston St. shots the aiming vector would change markedly and continuously with each shot. Instead, Oswald waited until the limo almost stopped while negotiating the 120o
turn onto Elm and had the first shot deflected. The other two were easy as the target was moving straight away and downhill. The aim vector for shot three hardly changed at all from shot two's. With one's eye against a 4x scope (as opposed to having a camera lens peering into it as it is shown in film
) it was an easier shot than, say, trying to hit your big toe with a pistol.
Conclusion: Oswald did it and did it alone. He had the method and the opportunity; his twisted motive died with him.