A memo written by FBI director J. Edgar Hoover, released among 2,800 declassified records relating to the assassination of President John F. Kennedy, has shown how in the days after Lee Harvey Oswald was shot, the FBI planned to convince the public that he was the real assassin as soon as possible. In the document, dictated shortly after Oswald was shot by Dallas nightclub owner Jack Ruby, Hoover explains. The thing I am concerned about, and so is [Attorney General Nicholas] Katzenbach, is having something issued so we can convince the public that Oswald is the real assassin," Hoover said in the 1963 memo. The former FBI director went on to explain that establishing which facts could and could not be made public was important because of the possible foreign policy implications. "There are several aspects which would complicate our foreign relations," Hoover says in the memo. These were namely that the FBI was aware Oswald had contacted both the Cuban embassy in Mexico City and the Soviet Embassy in Washington. Hoover explained that having the interception of these messages - one of them to the "man in the Soviet Embassy in charge of assassinations and similar activities on the part of the Soviet government" - made public would have "muddied the waters internationally." Roughly 300 documents of the tranche of what would have been 3,100 documents pertaining to the assassination of President Kennedy have been withheld [by] President Donald Trump.