Assassination Records Review Board Douglas Horne and Dr David Mantik talk about their new awarding movie "A Coup In Camelot" Douglas Horne worked for the U.S. Navy for twenty years in various capacities and served as a senior analyst for three years for the Assassination Records Review Board (ARRB), from 1995-1998, where he worked with the medical evidence and with records pertaining to Vietnam and Cuba policy. In 2009, Doug published a five volume book about the U.S. government's coverup of the medical evidence in Dr David Mantik is a board certified radiation oncologist, who previously served on the tenure-track physics faculty at the University of Michigan. He has reviewed the JFK artifacts at the National Archives on nine separate occasions.