Mexican drug lord Rafael Caro Quintero appeared before a judge in Brooklyn on Friday afternoon, pleading not guilty to charges related to his involvement in the decades-old killing of a Drug Enforcement Administration agent.

Mexican authorities finally extradited one of the most wanted drug lords in the United States, signaling that the Latin American

Rafael Caro Quintero was arraigned on multiple drug and weapons offenses in Brooklyn federal court following his extradition Thursday to the U.S. from Mexico.