John F. Kennedy assassination rifle HSCA tests proved conclusively that the claim was not accurate. In 1972 the Kennedy family chose John K. Lattimer, MD as the first nongovernmental expert to examine evidence taken at Kennedy's autopsy. Lattimer performed ballistic tests and other research to prove that Lee Harvey Oswald was likely the sniper who shot and killed President John F. Kennedy from the Texas School Book Depository in Dallas. Dr. Lattimer frequently performed a demonstration of Oswald's shooting, firing three well-aimed shots within 8.3 seconds with Carcano M91/38 and under the same firing conditions. By doing so Dr. Lattimer intended to prove that Oswald
John F. Kennedy Rose Elizabeth Fitzgerald Kennedy. His paternal grandfather P. J. Kennedy was a member of the Massachusetts state legislature. His maternal grandfather and namesake John F. Fitzgerald served as a U.S. Congressman and was elected to two terms as Mayor of Boston. All four of his grandparents were children of Irish immigrants. Kennedy had an elder brother, Joseph Jr., and seven younger siblings: Rosemary, Kathleen "Kick", Eunice, Patricia, Robert "Bobby", Jean, and Edward "Ted". Kennedy lived in Brookline for the first ten years of his life and attended the local St. Aidan's Church, where he was baptized on June 19, 1917.