Mexico has extradited 29 alleged criminals to the United States, among them the so-called “narco of narcos” Rafael Caro Quintero, many accused of murder and several alleged members of cartels now designated as Foreign Terrorist Organizations.

Mexico has sent drug lord Rafael Caro Quintero, who is wanted for the notorious killing of a U.S. DEA agent in 1985, to the United States with 28 other prisoners requested by the U.S. government, the Justice Department confirmed Thursday evening.

Alleged drug cartel boss Rafael Caro Quintero, who spent decades in prison in Mexico for the murder of a U.S. drug enforcement agent, pleaded not guilty in a U.S. court on Friday to drug trafficking charges that could result in his execution.