There are still people who think that Castro did it. Alexander Haig in his memoirs was one of them. Tim Gratz, a journalist who regularly posts at John Simkins JFK Education Forum (see my links) is another. There is actually quite a lot of evidence linking the JFK assassination to Castro and Cuba. My analysis: either Castro killed Kennedy or someone went to quite a lot of trouble to make it look that way. My vote--Door number 2. Gaeton Fonzi points out in his book The Last Investigation that a lot of the people linking Castro the assassination can themselves be linked to CIA officer David Atlee Phillips. Many of these stories were then picked up by the FBI and other elements of the CIA.