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.

Sunday's raid was one of Mexico's highest profile blows against drug gangs responsible for smuggling billions of dollars of drugs - including fentanyl - into ⁠the U.S. In recent

Here’s what we know about “El Mencho,” the alleged drug cartel leader taken out by the Mexican Army.

Mexico’s most notorious cartel boss was located and killed after intelligence agencies were able to track down one of his lovers to his secluded resort compound, officials said Monday. Mexico’s Defense Secretary Ricardo Trevilla said agents identified a man close to a girlfriend of New Generation Jalisco Cartel boss Nemesio “El Mencho” Oseguera Cervantes prior to Sunday’s raid.

The Mexican army killed the drug lord during an operation to capture him, according to a report from the Associated Press. El Mencho was the Mexican government’s “biggest prize yet” to show the Trump administration its efforts to crack down on the cartels.