Nicky Barnes was an American drug lord in the 1970s and 1980s, known for his significant role in the heroin trade in New York City. He led a criminal organization that became one of the most powerful drug trafficking groups during that time, earning him the nickname "Mr. Untouchable." His operations were marked by violence and corruption, and he was eventually arrested and convicted on drug charges. After serving time in prison, Barnes became a government informant, providing information about other criminals. His life inspired various media portrayals, including the film American Gangster, which highlighted the drug trade and the law enforcement efforts to combat it.