An alleged Mexican kingpin the White House called “one of the most evil cartel leaders in the world,” who is charged with killing a Drug Enforcement Administration agent in 1985, was among dozens of suspects extradited to the U.

Rafael Caro Quintero, nicknamed “El Narco de Narcos” (The Narco of Narcos) is the founder of the now defunct Guadalajara Cartel—one of the most powerful drug cartels of the 1980s that later splintered into various groups, including the Sinaloa Cartel, one of the world’s most powerful criminal organizations and drug cartels.

MEXICO CITY — Mexico extradited 29 alleged drug traffickers to the United States on Thursday, including Rafael Caro Quintero, a prized target long sought in the killing of a U.S. narcotics agent, and two leaders of the hyper-violent Zetas cartel,