Read it before. His 'conclusions' are based on some presupposition that the Groden 'doctored' photos are indication of some sinister conspiracy.
For one, his artice has a number of 'We have no proof that the final frontal shot was from a Carcano nor do we know what bullets were used thus the following is just academic speculation as to what is possible. " and " I have never shot taped melons like Alverez" or this little gem "this would be a fifth bullet which is not supported by existing photo and medical evidence"
His math is correct for the most part on the kinetic energies, BUT he does not take into account
the movement of the vehicle(15 mph vs 3mph he states),
the direction of the 'jet effect', which didn't really occur,
the physiology of the human body when it loses all muscle control,
the effect of wearing that horrible back brace on the same body
the loss of velocity from the TSBD to the target (approx 1/3)
or by using the drawing below, how that '45' bullet he states is used arrived where it is supposedly found.
/Tobias_frontal_shots/Photos/Dealey22.jpg)
And no matter what the conjecture is from the article...this is not a bullet, much less a 45. /Tobias_frontal_shots/Photos/Close-15.jpg)
The bottom line in all of this is simple.
1. Oswald acted alone.
OR
2. Some sinister encompassing conspiracy of Cubans, the mob, and the CIA, with untold numbers of people knowing about it, but not talking all these years, killed Kennedy.
And there is one very important item that is overlooked in almost all the books written. Posner got it right and it shows in Zapruder.
Abraham Zapruder had vertigo, his secretary supported him as he shot the film.
Each time a shot is fired the camera jiggles in reaction, and loses focus. It occurs 3 times, and 3 times only.