The world's most infamous cartel boss Joaquin "El Chapo" Guzman, who rose from poverty in rural Mexico to amass billions of dollars, was found guilty in a U.S. court on Tuesday (Feb 12) of smuggling tons of drugs to the United States over a violent, colourful, decades-long career. Jurors in federal court in Brooklyn convicted Guzman, 61, head of the Sinaloa Cartel, on all 10 counts brought by U.S. prosecutors.