JFK Facts

JFK Facts

New JFK File: Spymaster Angleton Vetted Assassins in Late 1963

Top CIA official received polygraph tests of a Cuban hitman while reviewing FBI reports on an unknown ex-defector named Lee Harvey Oswald.

Jefferson Morley's avatar
Jefferson Morley
Sep 02, 2025
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Background: CIA counterintelligence chief James Angleton (Credit: CIA); Left: Lee Harvey Oswald in New Orleans in August 1963 (Credit: WDSU-TV); Right: Herminio Diaz Garcia in May 1966 (Credit: tangodown63.com)

In October 1963, CIA counterintelligence chief James Angleton was monitoring two men who would become notorious as assassins.

One was a hitman named Herminio Diaz Garcia, who emigrated from Cuba to Florida in the summer of 1963, according to a newly released CIA file.

The other was Lee Oswald, an ex-Marine, ex-defector to the Soviet Union, and supporter of the leftist Fair Play for Cuba Committee (FPCC), which Angleton’s staff had illegally targeted for dirty tricks and destruction.

Angleton’s handling of intelligence reports on two would-be assassins, reported here for the first time, is the latest unknown chapter in the JFK assassination story to emerge from CIA files ordered released by President Donald Trump in January.

From the CIA, Herminio Diaz Garcia 201 File
10.5MB ∙ PDF file
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This is the CIA's file on Herminio Diaz Garcia, a Cuban hit man known to the CIA and FBI, who was killed on a mission to assassinate Fidel Castro in 1966.
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