Read the Warren report.
Though there are inconsistencies, as is likely in any investigation, it is fairly conclusive.
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There is no evidence to link the mafia with Lee Harvey Oswald, the man who shot Kennedy. Oswald was known to dislike minorities, including Italians which means he would not likely have cooperated with them in any case, much less killed the President for them.
Lee Harvey Oswald was accused of assassinating President John F. Kennedy on 22 November 1963. ... The gun Oswald used to shoot Kennedy was a 6.5 mm Mannlicher-Carcano bolt-action rifle... Oswald was captured in the Texas Theater, where the movie War Is Hell (starring Audie Murphy) was playing.
One would suspect that Ruby knew Oswald and did not want him to talk, but no good evidence to that effect was found.
Lee Harvey Oswald shot President Kennedy from the Texas School Book Depository in Dallas, Texas.The Warren Commission, and several subsequent investigations, all concluded that he was assassinated by Lee Harvey Oswald on November 22, 1963.
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The strongest evidence points to a single gunman (Lee Harvey Oswald) working alone.
President John F. Kennedy.
Lee Harvey Oswald
The Warren Report, stating that Lee Harvey Oswald assassinated President Kennedy, was released in 1964.
Oswald was shot and killed by Jack Ruby two days after Kennedy was assassinated. There was never a chance to put Oswald on trial.
Lee Harvey Oswald
President J. F. Kennedy.
With an understanding that the question means who was blamed for the assassination of President Kennedy, the Warren Commission stated that a lone gunman, Lee Harvey Oswald was to blame. Many people believe, however, that the killing of Kennedy was a conspiracy and that Oswald was not the only person involved with Kennedy's death.
The United States government concludes that Lee Harvey Oswald murdered Kennedy. If you research and look, you can tell that Oswald did not. There is evidence that leads to the U.S. government's involvement along with the CIA.
John F. Kennedy
Dallas, Texas.
Lee Harvey Oswald