John F. Kennedy assassination conspiracy theories stated that the Warren Commission had "failed to investigate adequately the possibility of a conspiracy to assassinate the President". The Ramsey Clark Panel and the Rockefeller Commission both supported the Warren Commission's conclusions. The last remaining documents under Section 5 of the President John F. Kennedy Assassination Records Collection Act of 1992 were released on October 26, 2017, while the remaining ones that are still classified will only be analyzed for redactions. According to author John C. McAdams, "[t]he greatest and grandest of all conspiracy theories is the Kennedy assassination conspiracy theory." Others have often referred to it as "the
John F. Kennedy assassination conspiracy theories no evidence that the Soviet Union was involved in the assassination of President Kennedy. The House Select Committee on Assassinations also wrote: "The committee believes, on the basis of the evidence available to it, that the Soviet Government was not involved in the assassination of President Kennedy". According to some conspiracy theorists, the Soviet Union, with Nikita Khrushchev motivated by having to back down during the Cuban Missile Crisis, was responsible for the assassination. According to a 1966 FBI document, Colonel Boris Ivanov—chief of the KGB Residency in New York City at the time of the assassination—stated that it was