Just to be clear, as I've explained before: There is a 6.3 x 2.5 mm fragment inside the image of the 6.5 mm object on the AP skull x-ray. It is on the rear outer table of the skull about 1 cm (0.40 inches, or 4/10ths of an inch) below the debunked cowlick entry site. OD measurements confirm that the 6.3 x 2.5 mm object is metallic. This fragment simply could not have come from an FMJ bullet, for the same reasons that Dr. Larry S-t-u-r-d-i-v-a-n provides in his 2005 book,
The JFK Myths, when he explains why the 6.5 mm object could not have come from an FMJ bullet (pp. 184-186).
There is also a small bullet fragment slightly to the left of the 6.3 x 2.5 mm fragment. Dr. Gerald McDonnel identified this fragment in his report to the HSCA:
A small metallic fragment lies medial to the fracture site between the galea and the outer table of the skull. . . . A small metallic fragment is located medial to the location of the spherical metallic fragment [the 6.5 mm object] and fracture lying between the galea and the outer cranial table.
The discovery of the McDonnell fragment was significant. The HSCA FPP simply ignored this crucial discovery. Since the fragment is to the left of the 6.3 x 2.5 mm fragment, it is also 1 cm below the cowlick site. Three questions come to mind:
One, how would a bullet striking the skull at a
downward angle have sheared off two fragments
below the entry site? As firearms expert Howard Donahue noted, basic physics and common sense tell us that any shearing would have occurred at the top of the entry site, since the bullet was striking at a downward angle.
Two, how would either of these supposedly sheared-off fragments have ended up 1 cm below the entry site if the bullet struck the skull at a downward angle?
Three, how would one fragment end up on the outer table of the skull and the other fragment end up between the outer table and the galea? The area between the galea and the outer table is the pericranium. The galea and pericranium are both dense, tough fibrous membranes that cover the outer table (they are a separated by the loose areolar layer, a weak and flexible layer). One of the fragments plowed through both the galea and the pericranium and embedded in the outer table, while the other plowed through the galea but stopped in the pericranium. How in the world could this have happened if both fragments were sheared off?
Obviously, the two fragments were not sheared off but hit the skull at different velocities and at a perpendicular angle, causing one to penetrate more deeply than the other,
which is exactly what you'd expect from ricochet fragments.
It is obvious why the HSCA FPP majority did not want to deal with the McDonnell fragment. Only Dr. Wecht raised the issue that FMJ bullets do not shear off fragments at the entry point. This is undoubtedly why the FPP majority felt obliged to make the awkward claim/admission that it is "rare" for FMJ bullets to behave in this manner. Revealingly, they failed to cite a single case where an FMJ bullet had done this. None of the FMJ bullets in the WC's wound ballistics tests did this, and no FMJ bullet in any subsequent test has done this. It is simply unheard of. As Dr. S-t-u-r-d-i-v-a-n has said,
A fully jacketed WCC/MC bullet will deform as it penetrates bone, but it will not fragment on the outside of the skull. (pp. 184-185)
Surely the FPP majority knew this as well. They knew that claiming that two fragments sheared off the alleged FMJ bullet and then somehow ended up in different layers would be untenable and non-credible, so they ignored the McDonnell fragment.