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 assassination conspiracy theories about the notion that the Mafia and U.S. intelligence and the anti-Castro activists were involved together in the assassination of President Kennedy. In fact, there's no contradiction there. Those three groups were all in bed together at the time and had been for several years in the fight to topple Fidel Castro." News reporter Ruben Castaneda wrote in 2012: "Based on the evidence, it is likely that JFK was killed by a coalition of anti-Castro Cubans, the Mob, and elements of the CIA." In his book, "They Killed Our President", former Minnesota governor Jesse Ventura concluded: "John F. Kennedy was