Mexico's Most Feared Cartel Boss Killed,
Americans in Mexico warned of danger as violence breaks out after cartel head’s death – NBC 7 Sa n Diego Nationwide Violence Threatens U.S. Border States, Business, and Americans Abroad February 22, 2026 BLUF (Bottom Line Up Front) The Mexican Army's killing of Nemesio RubĂ©n Oseguera Cervantes — "El Mencho" — founder and supreme leader of the Jalisco New Generation Cartel (CJNG) on February 22, 2026, has triggered a wave of retaliatory cartel violence spanning at least five Mexican states, prompting U.S. Embassy shelter-in-place orders, airline flight cancellations, disruption to cross-border commerce, and serious near-term danger for tourists, expatriate Americans, and U.S. border communities from California to Texas. While the operation represents Mexico's most significant counternarcotics victory in years, security analysts warn that decapitating the CJNG leadership is as likely to ignite fractious succession violence and territorial warfare as it is to produc...