Son of El Chapo's partner gives detailed testimony about Sinaloa cartel
Vicente Zambada, a former Mexican drug trafficker and son of Ismael Zambada, testified Thursday against infamous kingpin Joaquin "El Chapo" Guzman. Zambada described the rampant violence that accompanied Guzman's rise to power atop the Sinaloa cartel. Criminal defense attorney VInoo Varghese joined CBSN to walk through the extensive testimony.