The son of 'El Chapo' Guzman's former right-hand man is reportedly talking to US authorities, and it could be trouble for the Sinaloa cartel

(AP Photo/Rashide Frias) The son of one of Sinaloa cartel kingpin Joaquin "El Chapo" Guzman's closest associates has pleaded guilty to drug-trafficking charges in the US. There are already signs the son is cooperating with US authorities, and he could provide them with detailed information about the cartel's inner workings. The details he divulges could lead to more blows to the cartel's leadership and set off another, bloodier round of infighting. Damaso Lopez Serrano, 29, pleaded guilty to dru...