McCoy addresses this theory in his book: The Politics of Heroin: CIA Complicity in the Global Drug Trade. His conclusion was that the CIA appreciated having a l

McCoy addresses this theory in his book: The Politics of Heroin: CIA Complicity in the Global Drug Trade. His conclusion was that the CIA appreciated having a little no-strings-attached pocket change, but that it wasn't funding them in a meaningful way, and that their involvement in the drug trade was more for the access that it gave them to shady people.