Dennis Duane David graduated from high school in 1955. He spent a term at the University of Illinois before joining the United States Navy in 1956. He attended the Hospital Corps School at Maryland and later overseas in North Africa. On his return to the United States he became an Administrative Technician at the Bethesda Naval Hospital. When John F. Kennedy was assassinated on 22nd November, 1963, his body was taken to Bethesda. That evening he was asked to type a memorandum for a FBI agent,