bullet that has such a circular disk at its base which can then become detached upon impact with the skull. the presence of this circular disk removes any doubt as to whether this key about that bullet. all the evidence shows it was a soft nosed or hol o point bullet. orr found another piece of evidence that leads to a second shooter. a bone fragment in the president s back. dr. wecht who had never considered a bone fracture agrees. you can see a clear defect there at the level of the first thoracic vertebrae. orr says after the bullet entered kennedy s back it traveled downward, then hit bone and ricocheted upward. the warren commission said it was always moving downward and never hit bone. but orr says the panel s measurements were wrong. instead he used the dimensions that placed the wound about four ich inches lower. the only thing that would deflect it would be something firm and that means the bone.