Bob Baer and his team of investigators have sifted through two million declassified files and have come to the conclusion that Oswald was supported by a network when he shot the US President in Dallas, Texas, on November 22, 1963.
However, his successor as president, Lyndon Johnson, was determined to keep conspiracy speculation to a minimum because he feared it could lead to a war with Russia.
Mr Baer’s trawl of the files reveals that eight weeks before the assassination Oswald travelled to Mexico City and went to the Russian embassy there.
The CIA veteran of 21 years believes that during the trip Oswald met a Russian espionage chief who was in charge of assassinations for the Kremlin.
He also visited the Cuban Embassy in Mexico City and tried to get a visa to visit revolutionary Fidel Castro’s island. Mr Baer said: “We go through the evidence and determine whether there was additional contact.
“We found none with the Russians but we found plenty of evidence that Oswald, after his visit to Mexico City, was in touch with Cuban dissidents, exiles, very violent ones who also happened to be reporting back to Havana.
“This gets into a dark area. My hypothesis is that the Cubans may have passed on their suspicions that Oswald was going to kill Kennedy. I think that Castro definitely got wind of this from Cuban exiles in the US.”
In 1962 the world was on the brink of nuclear war as president Kennedy forced Soviet Union leader Khrushchev to remove his missiles from Cuban soil.
During this period former US Marine Oswald spent three years living in Russia but returned to live in Dallas in 1962 with a Russian wife, Marina.
Multiple investigations at the time determined that Oswald acted alone when he shot President Kennedy with three shots from a rifle.
However, Mr Baer said: “There is damning evidence that he was not a lone wolf. I don’t think there was another shooter, but I think he was encouraged.”
He suggested that after the shooting Oswald was going to meet…