From Wikipedia

Oswald's Ghost

Lee Harvey Oswald
(October 18, 1939 – November 24, 1963)
Was, according to three United States government investigations, the assassin of U.S. President John F. Kennedy, who was fatally shot on November 22, 1963, in Dallas, Texas. A former United States Marine who defected to the Soviet Union and later returned, Oswald, age 24, was arrested on suspicion of killing Dallas police officer J. D. Tippit and later connected to the assassination of President Kennedy. Oswald denied any responsibility for the murders. Two days later, while being transferred under police custody from the city jail to the county jail, Oswald was shot and mortally wounded by Jack Ruby on live television. 

Oswald is shot by Jack Ruby.

 In 1964 the Warren Commission concluded that Lee Harvey Oswald assassinated President John F. Kennedy single-handedly, a conclusion also reached by prior investigations of the FBI and the Dallas Police Department. In 1979, the House Select Committee on Assassinations (HSCA) concluded, based largely on disputed acoustic evidence, that Oswald assassinated Kennedy "probably as a result of a conspiracy."
Critics have not accepted the conclusions of the Warren Commission and have proposed a number of alternative theories which assert that Oswald conspired with others or Oswald was not involved at all and was framed. One government investigation, the HSCA, ruled out many of these theories but concluded that, while Oswald was the assassin, that Kennedy was "probably" killed as the result of a conspiracy. However, the HSCA report did not identify any probable co-conspirators and its conclusion has been criticised for its reliance upon acoustic evidence that has been called into question.