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.

Zambada's lawyer Frank Perez has also represented his son, Vicente Zambada Niebla, who prosecutors say could testify against him at trial. Zambada Niebla previously testified against Joaquin "El ...