In 1973, Dr. Cyril Wecht published with Robert P. Smith, "The Medical Evidence in the Assassination of President John F. Kennedy," in the Forensic Science Gazette. It was later republished in Forensic Science in 1974. Here is an excerpt:
Sylvia Meagher wrote Dr. Wecht to ask him about his article:
Here is Dr. Wecht's reply:
Wecht notes that "the formidable problem with the front or right front shot theories is what happened to the bullet after it struck JFK's head? It would seem that at least some fragments would have had to have traveled into the left cerebral hemisphere, or into the back of the brain (depending on the exact location of the assassin), and we simply have no evidence to indicate such a dispersal pattern."
This is also why Oliver Stone's so-called documentary series, JFK: Destiny Betrayed, tried so hard to impeach the photographs of JFK's brain (here, here, and here) The left hemisphere of JFK's brain was intact, which is inconsistent with a shot from the front.