- The single-bullet theory (CE 399) is the load-bearing wall of the lone-gunman case. Critics argue the bullet recovered at Parkland does not match the nearly pristine “magic bullet,” the wound trajectories do not line up without contorting Connally and Kennedy, and Parkland doctors consistently described a large rear head exit wound plus a throat wound they took as an entrance.
- A front or grassy-knoll shot is argued from the Zapruder head snap, witness statements, and particle pattern on X-rays.
- The paraffin test on Oswald’s cheek was negative (hands positive). Official investigators later called the test unreliable; critics still treat the cheek result as consistent with not firing a rifle.
- Timing arguments (how many seconds he had) depend on which shot missed and when the limousine was where. Those numbers have been revised repeatedly.


