Russ Baker has the story at WhoWhatWhy.
I don’t think George H.W. Bush was involved in the assassination of JFK. Baker’s reporting casts doubt on the already dubious claim that Bush was in Dealey Plaza when JFK was killed.
But Baker demonstrates that Bush, as an oil company executive, collaborated with the CIA in advancing schemes of regime change in Latin American in the 1950s and 1960a.
That’s why President Ford’s appointment of Bush as CIA Director in 1976 was not problematic for the agency’s upper ranks. CIA directors who come from outside the clandestine service usually meet resistance from within. Stansfield Turner, CIA director under President Carter, and James Woolsey, CIA director under Bill Clinton, both had this experience.
Not George H.W. Bush. He was also an outsider in the sense that he did not build his career in the CIA but his previous collaboration with the agency made him a known quantity and acceptable choice to the agency’s leadership. He served for one year as the Agency came under fire for surveillance of American citizens and plots to assassinate foreign leaders.
In 1988, Bush became the only American president to have served as CIA director.