David Mantik is a board-certified radiation oncologist, who (while still young) served on the tenure-track physics faculty at the University of Michigan. He also directed the residency training program at Loma Linda University, where he used protons, electrons, and X-rays to treat cancer. He received his Ph.D. in physics from the University of Wisconsin, his MD from the University of Michigan, completed a post-doctoral fellowship at Stanford University and held a Junior Faculty Clinical Fellowship at the University of Southern California. He has visited the JFK artifacts at the National Archives on nine separate days. While there he made hundreds of measurements on the extant JFK autopsy X-rays. His e-book is JFK’s Head Wounds.