Nemesio Rubén Oseguera Cervantes — known as "El Mencho" — was the boss of one of the fastest-growing criminal networks in Mexico.

Nemesio Rubén Oseguera Cervantes, known as “El Mencho,” headed the cartel, which is a major source of drugs coming to Chicago and elsewhere in the United States, according to the DEA.

In nine years of wintering in Puerto Vallarta, the sun-washed resort city on Mexico’s Pacific Coast, Berl Schwartz has heard plenty of rumors about the cartel presence.

Twenty-five members of the Mexican National Guard were left dead in Jalisco in six separate attacks after the killing of Jalisco New Generation Cartel leader Nemesio Oseguera Cervantes, Mexico

By Raul Cortes, Aida Pelaez-Fernandez and Sarah Morland MEXICO CITY, Feb 23 (Reuters) - A tip about drug lord Nemesio Oseguera's romantic liaisons led Mexican authorities to the cartel leader's hideout in a small town of Jalisco state where he was killed,

RIU Hotels & Resorts, which operates 23 hotels in Mexico, eased the restriction a day after the death of a notorious cartel boss.

Widespread cartel violence in Jalisco following the killing of drug lord "El Mencho" has triggered international safety concerns and travel disruptions just months before Guadalajara is set to host

U.S. citizens in Mexico are being advised to shelter in place after a cartel leader was killed, setting off violence in several regions.