Mexican authorities say surveillance of a romantic partner helps special forces find and kill cartel boss Nemesio “El Mencho” Oseguera Cervantes.

Death of cartel boss El Mencho could impact America's ongoing fentanyl crisis as his organization allegedly caused hundreds of thousands of overdoses.

The Secretary General of National Defense, General Ricardo Trevilla Trejo, informed that Nemesio Oseguera Cervantes, alias “El Mencho”, was located thanks to a meeting he had in Tapalpa, Jalisco, with his romantic partner, who is apparently Guadalupe Moreno Carrillo.

Personal belongings inside the house where Mexican drug cartel leader Nemesio Oseguera, better known as 'El Mencho', spent his final hours before he was injured in a military raid and subsequently died while being transported in a helicopter, outside Tapalpa, Mexico, February 24, 2026. REUTERS/Liberto Urena

Top security officials revealed details of the operation that led to the death of Mexico’s most wanted drug cartel leader.

Documents reveal the fall of “El Mencho" was the culmination of an aggressive “total elimination" strategy pursued by the U.S. against the Jalisco New Generation Cartel (CJNG).

EL PAÍS gained access to the cabin complex, nestled in a luxurious mountain retreat in Jalisco, where the world’s most wanted drug trafficker and his security detail staged their last stand with the M

Juan Carlos Valencia González is one of the leaders of Cartel de Jalisco Nueva Generacion (CJNG). His mother, Rosalinda Gonzalez Valencia, is married to Nemesio Ruben Oseguera-Cervantes aka El Mencho – making Juan his stepson.