His younger brother Robert F. Kennedy was assassinated after being shot on June 5, 1968, and died the day after.

Civil rights leader Martin Luther King Jr. was assassinated on April 4, 1968.

[1] These assassinations have attracted several conspiracy theories, which have been exacerbated by the fact that several documents have remained classified.

When this time arrived during Donald Trump's first presidency, several documents were declassified; however, others remained classified.

[3] While Trump stated in his first presidency that he intended to declassify the remaining classified records, he later abstained from doing so due to appeals relating to national security reasons by the CIA and FBI.