Carlos Lehder

Lehder was one of the founding members of Muerte a Secuestradores ("MAS"), a paramilitary group whose focus was to retaliate against the kidnappings of cartel members and their families by the guerrillas. His motivation to join the MAS was to retaliate against the M-19 guerrilla movement, which, in November 1981, attempted to kidnap him for a ransom; Lehder managed to escape from the kidnappers, though he was shot in the leg. He was one of the most important MAS and Medellin Cartel operators, and is considered to be one of the most important Colombian drug kingpins to have been successfully prosecuted in the United States.
Additionally, Lehder "founded a neo-Nazi political party, the National Latin Movement, whose main function, police said, appeared to be to force Colombia to abrogate its extradition treaty with the United States." Provided by Wikipedia