From the BBC:
A new documentary exploring the death of John F Kennedy claims his assassin was directed and paid by Cuba.
Rendezvous with Death, based on new evidence from Cuban, Russian and US sources, took three years to research.
One source, ex-Cuban agent Oscar Marino, said Havana had exploited Lee Harvey Oswald, who was arrested but shot dead before he could be tried. . .
Mr Marino told film director Wilfried Huismann that he knew for certain the assassination was an operation run by the Cuban secret service G2, but he declined to say whether it had been ordered by Mr Castro.
In Deutsche Welle, an interview with Huismann.
DW-WORLD: We know that Lee Harvey Oswald killed John F. Kennedy. But who ordered his assassination and why?
Wilfried Huismann: We settled the question of why in three years of research on this documentary in Mexico, USA and Cuba. Oswald had been an agent for the Cuban intelligence services since November 1962. He was a political fanatic and allowed himself to be used by the Cuban intelligence services to kill John F. Kennedy. It was a Cuban reaction to the repeated attempts of the Kennedy brothers, above all the younger Kennedy, Robert, to get rid of Fidel Castro through political assassination — a duel between the Kennedys and the Castros, which, like in a Greek tragedy, left one of the duelists dead.