Nemesio Rubén Oseguera Cervantes, known as "El Mencho," was the leader of the notorious Jalisco New Generation Cartel prior to his death on Sunday.

Who is the girlfriend of Rubén Nemesio Oseguera Cervantes “El Mencho”? She helped locate the cartel leader.

According to estimates from the U.S. Drug Enforcement Administration ( DEA ), Nemesio Oseguera Cervantes was considered one of the richest drug lords in the world. U.S. authorities calculated that his net worth could exceed $1 billion, although other assessments place it at no less than $500 million.

Like other drug lords, Nemesio Oseguera Cervantes, known as “El Mencho,” had spent years avoiding the spotlight

A carefully coordinated intelligence effort led Mexican forces to a secluded mountain compound where the country’s most wanted cartel leader

Mexican security forces kept up their battle with cartel gunmen following the killing of the country's most powerful drug lord, which sparked a surge in violence and left more than 70 people

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

The killing of Nemesio Rubén Oseguera Cervantes in an operation in Jalisco state is likely sending "psychological shockwaves" through Mexico's drug cartels, a former high-place U.S. official told CBC News on Monday.

Nemesio “El Mencho” Oseguera Cervantes was a feared Mexican drug lord and the leader of a ruthless cartel accused of masterminding efforts to push fentanyl into the United States.

There is great concern about possible violence during El Mencho's funeral ceremonies.

Deputy Secretary of State Christopher Landau described Nemesio "El Mencho" Oseguera as "one of the bloodiest and most ruthless drug kingpins."

Nearly 100 suspected cartel drug traffickers, including Nemesio El Mencho Oseguera Cervantes's brother, were transferred to the US for trial after a terrorist designation. Nemesio, the leader of the Jalisco New Generation Cartel,