Blog: ‘El Chapo’s’ defense team takes aim at a key witness – Los Angeles Times

In three days of testimony that concluded Monday, Zambada, 43, the son of Guzman’s longtime partner, Ismael “El Mayo” Zambada, coolly detailed the intimate workings of the Sinaloa cartel, explaining how he helped his bosses traffic thousands of kilos of drugs and guns, pay off scores of Mexican officials and order the torture and killings of rivals.