We have discussed the pre-assassination set-up; now let us consider the post-assassination cover up.
First, is the simple fact that the provenance and chain of custody of much of the evidence presented to the Warren Commission is, at best, questionable. Missing x-rays, photos, and other evidence--including JFK's brain, or what's left of it, sealed in formalin--are nearly as important as the crime scene (the Presidential limousine), which was being scrubbed down by the Secret Service at the hospital. Then there are the mysterious figures at Bethesda instructing the pathologists conducting JFK's autopsy what to do and what not to do during the autopsy. Finally, there is the mysterious and sudden appearance of a nearly pristine bullet, Commission Exhibit 399 (CE 399), whose striations matched those of Oswald's rifle, on one of the stretchers in Parkland's ER that afternoon.
Besides its questionable provenance, CE 399 has a number of problems. First is the small (less than two-and-a-half grains) amount of mass that was lost from this bullet that supposedly had gone through two men, including several large bones.
Second, it appears that the amount of metal left behind by CE 399 as it traversed the two men's bodies probably exceeds the total mass lost by the bullet. The two largest fragments left in Governor Connally's right wrist--and these are not the only fragments that were left--are, according to the Warren Commission, 2x3 mm and 1x2 mm.
With a very conservative estimate of 0.1 mm thickness for each fragment, and a specific gravity of approximately 10.25 g/cc for the lead alloy of the bullet, you get 0.082g or 82 mg for the weight of those two fragments alone, or 1.27 grains of lead alloy in gun speak. This is conservatively of the mass missing from CE 399, and the actual average thickness of those two fragments is more likely to be 0.2 or 0.3 mm, doubling or tripling the mass of the two fragments. There are also a number of smaller fragments in Connally's wrist, chest, and leg according to his x-rays. I think a proper inventory of the lead fragments in John Connally's body would show he had a far greater mass of bullet fragments in his body than the mass of the lead missing from CE 399.
And this does not include whatever lead fragments might be in JFK's body from the passage of that "magic bullet."
That is if CE 399 ever passed through President Kennedy.
The magic performed by this bullet inside of JFK's body is every bit as amazing as that which it is supposed to have performed after it left.
CE 399 supposedly entered the President's body at a 45-60 degree downward angle (affidavit of retired FBI agent Francis X. O'Neill to House Select Committee on Assassinations, p. 4), leaving "a 7 x 4 millimeter oval wound." This wound was "Situated on the upper right posterior thorax just above the upper border of the scapula"This wound is measured to be 14 cm. from the tip of the right acromion process and 14 cm. below the tip of the right mastoid process." (Warren Report: Appendix IX; Autopsy Report and Supplemental Report; Clinical Record, Autopsy Protocol.)
We are then told that this "magic bullet" tumbled through JFK's upper torso and lower neck, missing blood vessels, bone and muscle; leaving the other organs in that area of the body untouched, except:
"the apex (supra-clavicular portion) of the right pleural cavity. In this region there is contusion of the parietal pleura and of the extreme apical portion of the right upper lobe of the lung. In both instances the diameter of contusion and ecchymosis at the point of maximal involvement measures 5 cm. Both the visceral and parietal pleura are intact overlying these areas of trauma." (Warren Report: Appendix IX; Autopsy Report and Supplemental Report; Clinical Record, Autopsy Protocol.)
In other words, there is a bruise about two inches across in the area of the upper right lung.
After this fantastic journey through JFK's body, CE 399 then exited the President's body, leaving a wound which could be mistaken by the trauma team at Parkland Memorial Hospital--who were experienced with gunshot wounds--to mistake it for an entrance wound when they performed a tracheotomy. Then CE 399 continued on its merry way, making up for the lack of damage it did to JFK internally, with John Connally's horrific wounds.
A miraculous bullet with a sense of balancing the books.