In September of 1976, George DeMohrenschildt (one of the numerous colorful characters connected to Lee Harvey Oswald and the JFK assassination) wrote a letter to George H. W. Bush--who at that time was the Director of the Central Intelligence Agency--to ask for his help in getting rid of the gang of "vigilantes" that had invaded his privacy and insisted on following him and his wife "everywhere." In this letter, DeMohrenschildt seems to be describing a phenomenon eerily akin to what is now known as "gangstalking." Alas, DeMohrenschildt's request for assistance did not end well, as you can see for yourself by clicking HERE.
It's worth noting that in his bestselling 1989 book CROSSFIRE: THE PLOT THAT KILLED KENNEDY, the late investigative journalist Jim Marrs wrote the following about DeMohrenschildt's untimely death:
"In mid-March [of 1977] DeMohrenschildt, convinced that evil forces were still after him, fled to a relative's Florida home leaving behind clothing and other personal belongings. It was in the fashionable Manalapan, Florida, home of his sister-in-law, that DeMohrenschildt died of a shotgun blast to the head on March 29, 1977, just three hours after a representative of the House Select Committee on Assassinations tried to contact him there.
"Earlier that day, he had met author Edward J. Epstein for an interview. In a 1983 Wall Street Journal article, Epstein wrote that DeMohrenschildt told him that day that the CIA had asked him 'to keep tabs on Oswald.'
"However, the thing that may have triggered DeMohrenschildt's fear was that Epstein showed him a document that indicated DeMohrenschildt might be sent back to Parkland [Hospital in Dallas] for further shock treatments, according to a statement by Attorney David Bludworth, who represented the state during the investigation into DeMohrenschildt's death.
"Although several aspects of DeMohrenschildt's death caused chief investigator Capt. Richard Sheets of the Palm County Sheriff's Office to term the shooting 'very strange,' a coroner's jury quickly ruled suicide" (p. 287).