Mario Cárdenas Guillén is the brother of the Mexican drug lord who was the former leader of what group?
Osiel Cárdenas Guillén Osiel Cárdenas Guillén (born May 18, 1967) is a former Mexican drug lord and the former leader of the Gulf Cartel (Spanish: "Cártel del Golfo" ) and Los Zetas. Originally a mechanic in Matamoros, Tamaulipas, where he was born, he entered the Gulf Cartel by helping Juan García Abrego, the capo at the time; when García Ábrego was arrested in 1996, some infighting erupted within the cartel. Osiel Cárdenas eventually took control by killing his friend and contender Salvador Gómez, earning Cárdenas the nickname ""El Mata Amigos"" (The Friend-Killer).
Víctor Manuel Mejía Múnera Víctor Manuel Mejía Múnera (July 11, 1959 – April 29, 2008), aka "El Mellizo (the twin)" or "Pablo Arauca", was a Colombian drug lord and former paramilitary leader along twin brother Miguel Ángel of the United Self-Defense Forces of Colombia (AUC) commanding the Bloque Vencedores de Arauca which demobilized in 2006.