Drug cartel leader Nemesio Rubén Oseguera Cervantes, commonly known as "El Mencho," was killed in a military operation on Feb. 22.

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

Former drug kingpin Owen Hanson joined NewsNation to discuss the signficance of the Jalisco New Generation Cartel leader's death.

Nemesio Rubén Oseguera Cervantes — known as "El Mencho" — was the boss of one of the fastest-growing criminal networks in Mexico, notorious for trafficking fentanyl, methamphetamine and cocaine to the United States and staging brazen attacks against government officials who challenged it.

A clandestine romantic meeting wasn't as secret as fentanyl kingpin "El Mencho" believed, leading to a fierce gunfight and the end of a narco-era.

Officials identified “El Tuli” as a top CJNG logistics and financial operator who acted as a right-hand man to "El Mencho."

Oseguera, 59, the mastermind of the ‌powerful Jalisco New Generation Cartel (CJNG) died in custody after being injured in a military operation by Mexican special forces in the town of Tapalpa in Mexico's Jalisco state, according to Mexico's defense ⁠ministry.

Mexican soccer matches were postponed after the army reportedly killed drug lord "El Mencho" near the World Cup host city Guadalajara, triggering violence in the region.

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