In one , prosecuted by the U.S. attorney 's office in Miami , Montoya admitted to one count of conspiracy to import more than 5 kilograms ( 11 pounds ) of cocaine into the United States and one count of obstruction of justice by murder , federal officials said . Former kingpin for Colombian drug cartel pleads guilty in Colombia District Court . Michele M. Leonhart had more than $ 10 billion reward on his head before his capture . District Court calls cartel `` most powerful and violent drug trafficking organization in U.S. ''
Former kingpin for Colombian drug cartel pleads guilty in Colombia District Court . Michele M. Leonhart had more than $ 10 billion reward on his head before his capture . District Court calls cartel `` most powerful and violent drug trafficking organization in U.S. ''