Onward.
What angle did the bullet hit from?
You would think this would be an exercise in high school geometry given we know from the Zapruder film where Kennedy's limo was at the moment his head exploded. The bottom of the Texas School Book Depository, the sixth floor window, and the location of Kennedy's head provide us with a right-angled triangle. Failing that, we have the autopsy photos which supposedly indicate an entry point for the shot and an exit wound for the shot.
As with many things about the JFK assassination, it's not quite so simple. For example, most of you will know there have been a couple of reviews of the Warren Commission's findings. One of the more well-known ones was the House Select Commission on Assassinations, the HSCA, in 1978 or so. At one point they controversially (because of the audio evidence Mercenary was talking about) found that it was likely there were two shooters, but reversed their stance.
But more interestingly, the HSCA made something of a magic bullet out of the final, headshot. A Warren Commission-supportive TV show did a "computer recreation" of the shot:
http://www.jfkfiles.com/jfk/html/concl3.htm
And the first thing they found was that the HSCA's computation of the trajectory of the headshot, given the nominated entry wound and exit wound of the bullet, was impossible. The HSCA's findings necessarily implied the final bullet originated from somewhere
above the roof of the Book Depository. The reason for that was because they didn't correctly calculate the angle JFK's head was at when the last bullet hit. So they do something else: they suggest the final bullet entry and exit wounds are not the result of a straight line trajectory, that the bullet deflects while tumbling through JFK's skull and head. They go on to suggest that because a shattered nose and tail section of a bullet were found in the limo that these were consistent with such a deflection and explained the non-straight-line of the entry and exit wound.
When the bullet hit, JFK's head was tilted forward somewhere between 11 degrees (the HSCA's calculation) and 27 degrees (the computer recreation). He's also turned away from Zapruder by about 25 degrees, and rolling over to the left by about 18 degrees.
These are significant numbers because the obliquity of the shot - the angle at which the final bullet struck JFK's head - was well under 60 degrees in each case and most likely well under 30.
So what?
Let me digress: assuming (which I don't) that CE399 is the single/magic bullet fired and passing through JFK and Connally, this is one reason why the forensics support one shot causing the seven wounds. The reason being that, under the same computer calculation I mentioned earlier,
http://www.jfkfiles.com/jfk/html/concl2.htm , the "magic bullet" is moving downward at an angle of about 17.5 degrees. CE399 coming out relatively pristine is an
expected result because the obliquity to the target is low ... and bullets hitting targets at low obliquity, that is, at below 20 degree obliquity, hold together significantly well on straight penetrations of their targets. The bullet doesn't deform significantly when it hits Kennedy, and by the time it hits Connally its velocity has slowed significantly. No velocity, no kinetic energy, less stress on the bullet, hence why it survived.
But as we've seen, if you assume (as the Warren Commission did) all the shots are coming from the one rifle in the space of about 7 to 8 seconds, you have a bullet fired at roughly the same obliquity (20 degrees vs. somewhere between 11 to 27 degrees) which behaves as if it had been fired at a much higher level of obliquity than the one fired only seconds before. Bullets fired between 30 and 60 degree obliquity or close to it significantly deform, even shatter. Kennedy's head has a cloud of tiny metal fragments in it, visible on X-rays. One pathologist, Dr. Humes, described a cloud of tiny metal fragments like grains of sand near the front exit wound in the head.
Miatella goes further: simply put, the shot which caused the results of Kennedy's head wound is not compatible with physics. It doesn't require frangible ammo. It doesn't require a dum-dum bullet. The shot did not take place at the obliquity which would generate massive fragmentation of the bullet such as was seen in Kennedy's head wound.
Then what would?
Miatella's view -- and it's one the best forensic book on the JFK assassination, Don Thomas's
Hear No Evil, shares -- is that a shot from the grassy knoll would occur at the required 60 degree obliquity to generate the destruction the bullet did. It is the only shot that explains the forensic results that Don Thomas speaks of in his book and which is explainable in physics.
But I think Miatella also misses the other possibility: if your bullet is travelling much faster than it was designed for, it necessarily has higher kinetic energy and is far more subject to warping and shattering on impact than it normally would be. Thus the Carcano round loaded into a Winchester jacket and fired with a Winchester rifle, at nearly double the muzzle velocity of the Carcano and with a much better-made, more accurate rifle.
But what about Edgewood Arsenal?
That is, the Warren Commission's attempts to duplicate the head shot. Edgewood Arsenal conducted 10 shots on human skulls to see if it could replicate Oswald's result. This being the Warren Commission, it did. 10 out of 10 times, the skulls blew out on the right side, consistent with Kennedy's results. You can see the results of the shots here:
http://www.maryferrell.org/showDoc.html?...lPageId=33
The problem being:
(1) it used dried out human skulls, which are vastly more fragile than the real thing -- as Warren Commission devotee Larry Sturdivan testified to before the HSCA.
(2) they filled the skulls with ballistic gel, which is not the same as brain matter and doesn't respond the same way brain does.
(3) The results are of massive, half-skull blowouts and facial reconstruction, not the top-quarter head blast we see on Kennedy's autopsy.
(4) It is also not clear that they calculated the correct obliquity of the shot, either. I have not gone looking for the film of the tests, but the report of the Arsenal itself says nothing about placing the gun at a higher angle to simulate the trajectory of the bullet. The only photo in the report of the setup for shooting shows a guy aiming a gun that is set up on the ground -- completely different from Oswald who was, by definition, six storeys up off the ground. This is important because angle of impact is highly significant, as Miatella points out.
(5) The shooters were attempting to replicate a result the Warren Commission insisted upon, i.e. entry at the occipital and exit at the right top. There are serious questions about whether this was how the bullet actually entered (Miatella thinks not). But that aside, that necessarily means the skulls are turned slightly to the left ... which raises the obliquity of the shot in any event.
(6) There was gelatin rather than a simulated scalp to cover the skull. This is significant too since they're not the same thing, and therefore changes the results. In later years the very same ballistic experts who conducted the Edgewood tests would acknowledge the lack of a scalp could increase the skull blast factor by four.
In summary: there has to be a second rifle, because the rifle and ammo in Oswald's position could not have produced the result of the head shot that it did. Sherlock Holmes, inverting Ockham's Razor, was blunt about it: when you have eliminated the impossible, whatever remains, however improbable, must be the answer. For there to be a second rifle, there are only three possibilities: different position, different weapon, different ammunition, or all three.
Some final thoughts: was Oswald involved?
Whether Oswald was involved or not I don't know. Sifting the information I've seen to hand including his TV interviews after arrest I'm inclined to think he knew something was going to happen, or possibly did take a shot, but he wasn't the man who fired the final shot that killed JFK. If I'd been on a jury and all of this material had been presented my obligation would have been to acquit, because the mass of evidence does not convict beyond reasonable doubt, particularly the forensics.
Oswald's famous defence is that he was "just a patsy". I'm inclined to think this might be the disproof of all those amateur psychologists out there who conclude that Oswald was a lone nut gunman who wanted to be famous, to be somebody, and that he killed JFK for that reason. Narcissists don't say they are "just" anything. A narcissist is the centre of the play.
On the other hand, Oswald's language and words shift around a bit. After saying he's just a patsy he later says he doesn't know anything about what's going on, and some amateur voice stress analysts say that his language illustrates he's bullshitting at some parts of his interviews, notably when he says "I didn't kill anyone" when supposedly the more honest response would have been along the lines of "I didn't kill the President". It's possible Oswald was duped into thinking he
would be an important part of some great scheme to save the American people, but who knows. Most of this is snake oil. All I am inclined to believe is the data: if it's possible that Oswald fired the last shot, it's on a likelihood with winning the lottery. But given all the SNAFUs around the JFK investigation, up to and including the Warren Commission and the HSCA, there's an awful lot of luck - good and bad - floating around the assassination of JFK.
God save us from people who mean well. -storm