After JFK assassination, President Truman put his concerns about CIA in print.

[kellytore]

7. There is no doubt in my mind

that Oswald was the shooter and probably acted alone. If the mafia, CIA, or Castro was behind the assassination, they would have used a better weapon than the Carcano rifle. This gun was made in 1940 and Italians would joke that this gun was the reason they lost WW2. Oswald purchased this gun thru the mail for $19.95 because it was the cheapest gun they sold. Oswald was a trained sharpshooter and still missed one of three shots. With a more sophisticated expensive rifle he would have been able to hit a slow moving target with all three. While it is true that Kennedy was disliked by some in the CIA and the mafia, the easiest way to dispose of his political career was to expose all of his infidelities before the next election which was less than one year away, and Hoover had a file full of this info.