Physical Evidence Anomalies
| Field | Detail |
|---|---|
| Topic | Physical evidence contradictions in the Warren Commission's lone gunman conclusion |
| Evidence Rating | STRONG — multiple independent forensic analyses challenge the official account |
The Magic Bullet (CE399)
The Warren Commission concluded that a single bullet — Commission Exhibit 399 — caused seven wounds in both Kennedy and Texas Governor John Connally. The bullet allegedly:
- Entered Kennedy's back
- Exited his throat
- Entered Connally's back
- Exited his chest
- Pierced his wrist
- Lodged in his thigh
- Was found on a Parkland Hospital stretcher in nearly pristine condition
Independent ballistic and forensic experts, including Dr. Cyril Wecht (HSCA forensics panel member) and multiple academic studies, have challenged this trajectory as anatomically and physically implausible given the documented seating positions of Kennedy and Connally.
Evidence Rating: STRONG that CE399 as described is physically impossible. The implication is that more than one shooter fired.
The Acoustic Evidence (HSCA, 1979)
The House Select Committee on Assassinations commissioned an independent acoustic analysis of a Dallas police dictabelt recording from November 22, 1963. The analysis, conducted by acoustics experts at Bolt, Beranek and Newman (BBN), found:
- Four shots were fired, not three
- One of the four shots originated from the Grassy Knoll, not the Texas School Book Depository
- Confidence level: 95%
This finding led the HSCA to conclude there was "probably a conspiracy."
A 1982 NRC panel challenged the BBN finding. The dispute has never been conclusively resolved — subsequent acoustic studies have again supported the original HSCA conclusion.
Evidence Rating: MODERATE for a second shooter from the Grassy Knoll.
Dealey Plaza Eyewitnesses
Of the approximately 90 witnesses interviewed about the direction of the shots:
- A majority reported hearing shots from the Grassy Knoll or the area in front of the motorcade, not from behind (where the TSBD was located)
- Several witnesses reported seeing a puff of smoke from behind the picket fence on the Grassy Knoll
- The motorcycle officer riding near Kennedy said his jacket and radio were spattered with blood from the front
The Head Shot Direction
The Zapruder film — the clearest visual record of the assassination — shows Kennedy's head snapping backward and to the left upon the fatal head shot. Proponents of a Grassy Knoll shooter argue this is consistent with a shot from the front-right.
Warren Commission defenders argue the backward snap could result from neuromuscular spasm. The debate remains unresolved among medical and ballistic experts.
The Autopsy
Kennedy's autopsy was performed at Bethesda Naval Hospital by military doctors rather than civilian forensic pathologists. Anomalies include:
- The attending Parkland Hospital physicians described the throat wound as an entry wound (from the front); the autopsy photos showed it as an exit wound (from behind)
- The brain photos in the official autopsy record are disputed — some researchers argue they do not match the brain seen by Parkland doctors
- Chain of custody for the autopsy materials was irregular
- Dr. Charles Crenshaw (Parkland) later wrote that the wound pattern he observed was inconsistent with a rear shot
Counterarguments
- The Warren Commission, JAMA, and mainstream forensic consensus maintain the single bullet theory is feasible given the exact geometry of the car seating.
- The HSCA acoustic evidence has been challenged by subsequent analysis.
- The Zapruder film's backward head motion can be explained by neuromuscular mechanisms.
- No physical evidence of a second shooter has been definitively found at the Grassy Knoll.
Related Pages
Sources
- HSCA Final Report (1979), Volume I — acoustic evidence
- Cyril Wecht, Cause of Death (1993)
- Robert Groden, The Killing of a President (1993)
- Josiah Thompson, Last Second in Dallas (2021)
- Bolt Beranek and Newman acoustic study (1978) — submitted to HSCA
Last Updated: 2026-04-08