Néstor Isidro Pérez Salas aka El Nini was the leader of the so-called “Ninis,” a group of notoriously violent enforcers for the Chapitos faction of the cartel. The Sinaloa Cartel is widely regarded as one of the world’s most perilous drug trafficking syndicates, notorious for its involvement in the sale of the lethal opioid, fentanyl. …