Amid the thousands of new files released yesterday – though less than expected – were two intriguing memos to, and from, FBI Director J. Edgar Hoover on November 24th, 1963 – the day that Jack Ruby killed Lee Harvey Oswald as the gunman was being transported to the Dallas County Jail after the assassination of President John F. Kennedy.

In a memo issued by Hoover, he appeared to be particularly concerned that the public would have to be compelled to believe that Oswald was a lone actor – not part of a larger conspiracy.

"There is nothing further on the Oswald case except that he is dead."

In the 1964 Warren Report on Kennedy's assassination, NBC notes, Hoover was firm in stating that he hadn't seen "any scintilla of evidence" suggesting a conspiracy – a sentiment he expressed in other public forums, as well, but not in words as blunt as those he used the day Oswald was killed.