( CNN ) -- Mexico 's high court has overturned a lower court ruling that freed Mexican drug lord Rafael Caro Quintero . The Mexican Supreme Court 's decision came a day after U.S. authorities said they would pay up to $ 5 million for information leading to Caro Quintero 's arrest or conviction . Caro Quintero , 61 , once leader of Mexico 's now-defunct Guadalajara Cartel , is accused in the 1985 kidnapping and killing of DEA agent Enrique `` Kiki '' Camarena and his pilot , Alfredo Zavala Avelar . He had served 28 years of a 40-year sentence for the killings when a judge in Mexico 's Jalisco state overturned his conviction in August . After a meeting in Washington in September , Mexican Attorney General JesÃºs Murillo Karam promised that authorities in his country would reapprehend Caro Quintero . But there 's been no word on the accused drug lord 's whereabouts since then . The Drug Enforcement Administration describes Caro Quintero as fugitive from the U.S. District Court for the Central District of California on felony murder and kidnapping charges , in addition to other criminal charges . On August 9 , a Mexican federal court overturned Caro Quintero 's conviction , ruling that he had been incorrectly tried in the country 's federal judicial system , when he should have been tried at the state level . In a 4-1 ruling Wednesday , Mexico 's Supreme Court declared that ruling invalid . CNN 's Catherine E. Shoichet , Mariano Castillo , Rafael Romo and Ashley Fantz contributed to this report .
Mexico 's The U.S. State Department declares an August appeals court ruling invalid . Catherine E. Shoichet , a former cartel leader , is accused of killing a The U.S. State Department agent . A Mexican judge overturned his conviction in a surprise ruling in August . Supreme Court is offering a up to $ 5 million reward for information leading to his capture .