With US President Donald Trump releasing previously unseen documents concerning the assassination of President John F. Kennedy in November 1963, Sputnik spoke with John C. McAdams, author of the book JFK Assassination Logic: How to Think about Claims of Conspiracy, regarding his thoughts on the case.

Sputnik: Do you believe that Lee Harvey Oswald alone was behind the assassination of President John F. Kennedy?

John C. McAdams: There's extraordinarily strong evidence that he shot Kennedy and an absence of evidence that anyone else, in fact, was involved. He was trying to get into Cuba because he was a huge fan of the Castro revolution and believed himself to be a Marxist.

He had gone to the Soviet Union and was very disillusioned with communism there. Like a lot of people who were disillusioned with communism in Russia, he looked for a new communist exemplar regime and he thought Castro's regime might be it and he wanted to get into Cuba, but failed to do so.

© AP Photo / Surrounded by detectives, Lee Harvey Oswald talks to the press as he is led down a corridor of the Dallas police station for another round of questioning in connection with the assassination of US President John F. Kennedy, November 23, 1963.

Sputnik: Do you believe that the CIA or the Castro Regime were involved in the assassination?

John C. McAdams: The CIA is, after all, a secret organization that certainly was willing during the heyday of the Cold War to mount assassination plots, particularly against Fidel Castro. So when you ask who might be able to kill Kennedy, or who might want to kill Kennedy — the CIA pretty much pops up as a likely candidate.

© AP Photo / Jim Altgens President John F. Kennedy is seen riding in motorcade approximately one minute before he was shot in Dallas, Tx., on Nov. 22, 1963. In the car riding with Kennedy are Mrs. Jacqueline Kennedy, right, Nellie Connally, left, and her husband, Gov. John Connally of Texas.

Some people believed, including President Lyndon B. Johnson, that US attempts to assassinate Fidel Castro backfired; that somehow Castro — knowing about these attempts — managed to enlist Lee Harvey Oswald to take out Kennedy sort of in retaliation. There's in fact no evidence for that. One theory is that Oswald was the self-appointed protector of the Cuban regime.

That is to say that he knew about the hostility between the Kennedy administration and Castro's regime and saw himself as protecting the Cuban Revolution.

The views and opinions expressed in the article do not necessarily reflect those of Sputnik.