Vicente Zambada Niebla, would continue as his attorney. Pérez's dual role, representing both father and son, has drawn scrutiny as Vicente has cooperated with U.S. authorities in a separate case.

At Guzmán's trial, Vicente Zambada recounted how his father and Guzmán ran the cartel together. At one point, he described corrupt Mexican politicians asking whether the syndicate could help ...

Vicente Zambada Niebla, who is cooperating with the government and who is likely to be called to testify against his father. "Because Vicente has information that might be used against you ...

Federal Attorney General Alejandro Gertz Manero told reporters Tuesday that Ismael "El Mayo" Zambada has asked Mexico for ...

At Guzmán’s trial, Vicente Zambada recounted how his father and Guzmán ran the cartel together. At one point, he described corrupt Mexican politicians asking whether the syndicate could help ...

At Guzmán's trial, Vicente Zambada recounted how his father and Guzmán ran the cartel together. At one point, he described corrupt Mexican politicians asking whether the syndicate could help ...