From the new paperback edition of THE GHOST:
“Historians and journalists usually describe COINTELPRO as an FBI program, which is not quite the case. It was created by Hoover but functioned as a joint FBI-CIA venture, with a bureaucratic division of labor. Hoover took the lead in targeting dissident Americans inside the United States; Angleton took the lead outside the United States. In the case of the Fair Play for Cuba Committee and its most famous member Lee Harvey Oswald, the FBI and the CIA would work together.
Angleton used the HUNTER program to feed the COINTELPRO beast.”