https:// en.wikipedia.org/wiki/Mary_Pinchot_Meyer
Mary Eno Pinchot Meyer (October 14, 1920 – October 12, 1964) was an American socialite, painter, former wife of Central Intelligence Agency official Cord Meyer and mistress of United States president John F. Kennedy.
Meyer was shot to death on the Chesapeake & Ohio Canal towpath on October 12, 1964, three weeks after the release of the Warren Commission Report, whose conclusions Meyer allegedly challenged.
In 1983, former Harvard University psychology lecturer Timothy Leary claimed that in the spring of 1962, Pinchot Meyer, who, according to her biographer Nina Burleigh "wore manners and charm like a second skin", told Leary she was taking part in a plan to avert worldwide nuclear war by convincing powerful male members of the Washington establishment to take mind-altering drugs, which would presumably lead them to conclude that the Cold War was meaningless.