Gary Webb, a Pulitzer-Prize winning journalist, published a book in the 1999 about the CIA's massive involvement in the world drug trade. He died a few years later; it was ruled a suicide, but he was found with two bullet holes in his head (a VERY odd 'suicide'):
"In 1999, Webb published Dark Alliance: The CIA, the Contras, and the Crack Cocaine Explosion, complete with extensive source citations.
The book includes an account of a meeting between a pilot (who was making drug/arms runs between San Francisco and Costa Rica) with two Contra leaders who were also partners with the San Francisco-based Contra/drug smuggler Norwin Meneses. According to eyewitnesses, Ivan Gomez, identified by one of the Contras as a CIA agent, was allegedly present at the drug transactions. The pilot told Hitz that Gomez said he was there to "ensure that the profits from the cocaine went to the Contras and not into someone's pocket...
According to Webb, Judd Iverson, a San Francisco defense attorney who represented former Contra Julio Zavala, discovered compelling evidence demonstrating that "agents of the U.S. government were intricately involved in sanctioning cocaine trafficking to raise funds for Contra revolutionary activity". (Dark Alliance, pp. 92-95) Soon after, members of the Justice Department persuaded U.S. District Court Judge Robert Peckham to seal the documents in the case...
On December 10, 2004, Gary Webb was found dead from two gunshot wounds to the head."