The most popular theory of the Kennedy Assassination is that there was a second gunman by the grassy knoll. Other theories point to an inside job done by the CIA because of the Bay of Pigs.

There is no lacking in the evidence of the assassination of JFK. There are many different conspiracy theories, but they are just theories. They all lack sufficient evidence for them to be credible.

It was in 1978 that the united States' House Select Committee on Assassinations reported their conclusions that the Kennedy assassination was likely the result of a conspiracy.

There are dozens of theories of conspiracy about the Kennedy assassination most relating to aspects of the cold war that was present at the time of his death. The USSR and Cuba and all communist/dictator nations were scutinized intensively but in the end it could not be proven.

Possibly however it is a conspiracy theory, he was apparently funded by the CIA.