A number of writers have claimed that the United States Central Intelligence Agency (CIA) is or has been involved in drug trafficking. Books on the subject that have received general notice include works by historian Alfred McCoy; English professor and poet Peter Dale Scott; and journalists Gary Webb, Michael C. Ruppert and Alexander Cockburn, as well as by writer Larry Collins. These claims have led to investigations by the United States government, including hearings and reports by the United States House of Representatives, Senate, Department of Justice, and the CIA's Office of the Inspector General. The subject remains controversial.
Following is a summary of some of the main claims made by geographical area.
During the Korean War, the first allegations of CIA drug trafficking surfaced after 1949, stemming from a deal whereby arms were supplied to Chiang Kai-shek's defeated generals in exchange for intelligence. Later in the same region, while the CIA was sponsoring a "Secret War" in Laos from 1961 to 1975, it was openly accused of trafficking heroin in the area then known as the Golden Triangle.
To fight its "Secret War" against the Pathet Lao communist movement of Laos, the CIA used the Meo (Hmong) population. Because of the war, the Hmong depended upon opium poppy cultivation for hard currency. The Hmong were very important to CIA operations and the CIA was very concerned with their well-being. The Plain of Jars had been captured by Pathet Lao fighters in 1964, which resulted in the Royal Lao Air Force being unable to land its C-47 transport aircraft on the Plain of Jars for opium transport. The Royal Laotian Air Force had almost no light planes that could land on the dirt runways near the mountaintop poppy fields. Having no way to transport their opium, the Hmong were faced with economic ruin. The CIA front Air America was, therefore, the only airline available in northern Laos. "According to several unproven sources, Air America began flying opium from mountain villages north and east of the Plain of Jars to CIA asset Hmong General Vang Pao's headquarters at Long Tieng."
Larry Collins´ sources alleged that, "During the Vietnam War, US operations in Laos were largely a CIA responsibility. The CIA's surrogate there was a Laotian general, Vang Pao, who commanded Military Region 2 in northern Laos. He enlisted 30,000 Hmong tribesmen in the service of the CIA. These tribesmen continued to grow, as they had for generations, the opium poppy. Before long, someone--there were unproven allegations that it was a Mafia family from Florida--had established a heroin drug refinery lab in Region Two. The lab's production was soon being ferried out on the planes of the CIA's front airline, Air America. A pair of BNDD [the predecessor of the US Drug Enforcement Agency] agents tried to seize an Air America."
The CIA's front company, Air America was alleged to have profited from transporting opium and heroin on behalf of Hmong leader Vang Pao,   or of "turning a blind eye" to the Laotian military doing it.  This allegation has been supported also by former Laos CIA paramilitary Anthony Poshepny (aka Tony Poe), former Air America pilots, and other people involved in the war. It is portrayed in the movie Air America. However, historian William M. Leary, writing on behalf of Air America, claimed that the opium transportation was done without the airline employees' direct knowledge and that the airline did not trade in drugs. Curtis Peebles denies the allegation of Air America's direct knowledge of the opium transportation, citing Leary's study as evidence.
Historian Alfred W. McCoy stated that:
In most cases, the CIA's role involved various forms of complicity, tolerance or studied ignorance about the trade, not any direct culpability in the actual trafficking ... [t]he CIA did not handle heroin, but it did provide its drug lord allies with transport, arms, and political protection. In sum, the CIA's role in the Southeast Asian heroin trade involved indirect complicity rather than direct culpability.
The CIA made its own internal inquiries of its staff and clients in Laos concerning the drug trade but never denied the essential allegation. Rather, the CIA took the position that trading in opium was legal in Laos until 1971. The CIA explained that opium served the isolated Lao hill tribes as their sole cash crop and that opium was one of the few medicines available in the primitive living circumstances.
The CIA had its own internal security agents investigating possible commercial opium exports mid-1968 onward. Air America, the CIA´s airline was barred from CIA airfields on suspicion of drug smuggling. One Hmong guerrilla commanding officer was pressured into giving up dealing in opium. The CIA concluded that small amounts of opium might have been smuggled via Air America, given wartime conditions. The Agency's case officers even staged a couple of impromptu raids on drug refineries, but were reined in by the CIA Office of General Counsel.
A number of allegations have been written about and several local, state, and federal investigations have taken place related to the alleged use of the Mena Intermountain Municipal Airport as a CIA drop point in large scale cocaine trafficking beginning in the early 1980s. Some conspiracy theories regarding the airport extend to alleging the involvement of figures such as Oliver North and former presidents George H. W. Bush and Bill Clinton.
An investigation by the CIA's inspector general concluded that the CIA had no involvement in or knowledge of any illegal activities that may have occurred in Mena, however, self investigation on alleged illegal activity is hardly conclusive. The report said that the agency had conducted a training exercise at the airport in partnership with another Federal agency and that companies located at the airport had performed "routine aviation-related services on equipment owned by the CIA".
A movie about these events called American Made focusing on the notorious pilot and Medellin cartel drug smuggler Adler Berriman Seal, a.k.a. Barry Seal, in which Seal is played by actor Tom Cruise was released on September 29, 2017.
In October 2013, two former federal agents and an ex-CIA contractor told an American television network that CIA operatives were involved in the kidnapping and murder of DEA covert agent Enrique Camarena, because he was a threat to the agency's drug operations in Mexico. According to the three men, the CIA was collaborating with drug traffickers moving cocaine and marijuana to the United States, and using its share of the profits to finance Nicaraguan Contra rebels attempting to overthrow Nicaragua's Sandinista government. A CIA spokesman responded, calling it "ridiculous" to suggest that the Agency had anything to do with the murder of a US federal agent or the escape of his alleged killer.
The Honduran drug lord Juan Matta-Ballesteros was the owner of SETCO, an airline which the Nicaraguan Contras used to covertly transport military supplies and personnel in the early 1980s. Writers such as Peter Dale Scott and Jonathan Marshall have suggested that the U.S. government's desire to conceal or protect these clandestine shipments led it to close the DEA office in Honduras when an investigation began into SETCO, allowing Matta-Ballesteros to continue and expand his trafficking.
In 1986, the United States Senate Committee on Foreign Relations began investigating drug trafficking from Central and South America and the Caribbean to the United States. The investigation was conducted by the Sub-Committee on Terrorism, Narcotics, and International Operations, chaired by Senator John Kerry, so its final 1989 report was known as the Kerry Committee report. The Report concluded that "it is clear that individuals who provided support for the Contras were involved in drug trafficking, the supply network of the Contras was used by drug trafficking organizations, and elements of the Contras themselves knowingly received financial and material assistance from drug traffickers."
In 1996 Gary Webb wrote a series of articles published in the San Jose Mercury News, which investigated Nicaraguans linked to the CIA-backed Contras who had smuggled cocaine into the U.S. which was then distributed as crack cocaine into Los Angeles and funneled profits to the Contras. His articles asserted that the CIA was aware of the cocaine transactions and the large shipments of drugs into the U.S. by the Contra personnel and directly aided drug dealers to raise money for the Contras. The Los Angeles Times, The New York Times, and The Washington Post launched their own investigations and rejected Webb's allegations. In May 1997, The Mercury News executive editor Jerry Ceppos, who had approved the series, published a column that acknowledged shortcomings in the series reporting, editing, and production, while maintaining the story was correct "on many important points." Webb later published a book based on the series, Dark Alliance: The CIA, the Contras, and the Crack Cocaine Explosion.
In 1989, the United States invaded Panama as part of Operation Just Cause, which involved 25,000 American troops. General Manuel Noriega, head of government of Panama, had been giving military assistance to Contra groups in Nicaragua at the request of the U.S.—which, in exchange, allowed him to continue his drug-trafficking activities—which they had known about since the 1960s. When the DEA tried to indict Noriega in 1971, the CIA prevented them from doing so. The CIA, which was then directed by future president George H. W. Bush, provided Noriega with hundreds of thousands of dollars per year as payment for his work in Latin America. However, when CIA pilot Eugene Hasenfus was shot down over Nicaragua by the Sandinistas, documents aboard the plane revealed many of the CIA's activities in Latin America, and the CIA's connections with Noriega became a public relations "liability" for the U.S. government, which finally allowed the DEA to indict him for drug trafficking, after decades of allowing his drug operations to proceed unchecked. Operation Just Cause, whose ostensible purpose was to capture Noriega, pushed the former Panamanian leader into the Papal Nuncio where he surrendered to U.S. authorities. His trial took place in Miami, where he was sentenced to 45 years in prison.
Noriega's prison sentence was reduced from 30 years to 17 years for good behavior. After serving 17 years in detention and imprisonment, his prison sentence ended on September 9, 2007. He was held in U.S. custody before being extradited to France where he was sentenced to 7 years for laundering money from Colombian drug cartels.
A failed CIA anti-drug operation in Venezuela resulted in at least a ton of cocaine being smuggled into the United States and sold on the streets. The incident, which was first made public in 1993, was part of a plan to assist an undercover agent to gain the confidence of a Colombian drug cartel. The plan involved the unsupervised shipment of hundreds of pounds of cocaine from Venezuela. The drug in the shipments was provided by the Venezuelan anti-drug unit which was working with the CIA, using cocaine seized in Venezuela. The shipments took place despite the objections of the U.S. DEA. When the failed plan came to light, the CIA officer in charge of the operation resigned, and his supervisor was transferred.
In addition, the former Venezuelan anti-narcotics chief General Ramon Guillen Davila and his chief civilian aide were both indicted in connection with the shipments. Because Venezuela does not extradite its citizens, Guillen was not tried in the U.S., but his civilian aide was arrested while in the United States and sentenced to 20 years.
Air America began flying opium from mountain villages north and east of the Plain of Jars to Gen. Vang Pao's headquarters at Long Tieng.