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SRCThe Guardian - World News
LANGEN
LEANCenter-Left
WORDS625
ENT10
MON · 2026-02-23 · 02:52 GMTBRIEF NSR-2026-0223-18426
News/Mexican president considers legal action/Who was El Mencho, the former police officer who co-founded …
NSR-2026-0223-18426News Report·EN·National Security

Who was El Mencho, the former police officer who co-founded an ultraviolent cartel in Mexico?

Nemesio Rubén Oseguera Cervantes, known as "El Mencho," a former police officer, co-founded the Jalisco New Generation Cartel (CJNG), which has become Mexico's most powerful and violent criminal organization. Based in Jalisco, the CJNG is known for its military-style arsenal and aggressive attacks, including using explosives-laden drones and landmines.

Staff and agenciesThe Guardian - World NewsFiled 2026-02-23 · 02:52 GMTLean · Center-LeftRead · 3 min
Who was El Mencho, the former police officer who co-founded an ultraviolent cartel in Mexico?
The Guardian - World NewsFIG 01
Reading time
3min
Word count
625words
Sources cited
1cited
Entities identified
10entities
Quality score
100%
§ 01

Briefing Summary

AI-generated
NEWSAR · AI

Nemesio Rubén Oseguera Cervantes, known as "El Mencho," a former police officer, co-founded the Jalisco New Generation Cartel (CJNG), which has become Mexico's most powerful and violent criminal organization. Based in Jalisco, the CJNG is known for its military-style arsenal and aggressive attacks, including using explosives-laden drones and landmines. El Mencho, who was killed on Sunday by Mexican special forces, had been involved in drug trafficking since the 1990s and previously served time in a US prison for heroin distribution. The CJNG is considered a national security threat by both the US and Mexico, with a presence in all 50 US states, and is a major supplier of cocaine, fentanyl, and methamphetamines, rivaling the Sinaloa cartel in power.

Confidence 0.90Sources 1Claims 5Entities 10
§ 02

Article analysis

Model · rule-based
Framing
National Security
Conflict
Tone
Mixed Tone
AI-assessed
CalmNeutralAlarmist
Factuality
0.80 / 1.00
Factual
LowHigh
Sources cited
1
Limited
FewMany
§ 03

Key claims

5 extracted
01

El Mencho was convicted of conspiracy to distribute heroin in the US in 1994.

factual
Confidence
1.00
02

The US Drug Enforcement Administration (DEA) considers the cartel to be as powerful as the Sinaloa cartel.

factualUS Drug Enforcement Administration (DEA)
Confidence
1.00
03

In 2015, cartel gang members shot down an army helicopter with a rocket launcher.

factual
Confidence
1.00
04

The CJNG is known for its displays of ultraviolence and its big, military-style arsenal.

factual
Confidence
1.00
05

El Mencho was the co-founder and leader of the Jalisco New Generation Cartel (CJNG).

factual
Confidence
1.00
§ 04

Full report

3 min read · 625 words
The drug lord “El Mencho”, who was killed on Sunday by Mexican special forces, was the co-founder and leader of a gang that in recent years had become the country’s most powerful criminal organisation: the Jalisco New Generation Cartel (CJNG).While less internationally famous than the Sinaloa Cartel of the now imprisoned Joaquín “El Chapo” Guzmán, the CJNG is a household name in Mexico, where it is known for its displays of ultraviolence and its big, military-style arsenal.The cartel, based in the state of Jalisco, has been one of the most aggressive in its attacks on the military – including on helicopters – and is a pioneer in launching explosives from drones and installing mines. An effort to capture El Mencho, real name Nemesio Rubén Oseguera Cervantes, a 59-year-old former police officer, ended badly in 2015, with cartel gang members shooting down an army helicopter with a rocket launcher.In 2020, it carried out a brazen assassination attempt with grenades and high-powered rifles in the heart of Mexico-city" class="entity-link entity-location" data-entity-id="1779" data-entity-type="location">Mexico City against the then head of the capital’s police force and now the federal security secretary.The security specialist Eduardo Guerrero said in 2021 that the authorities north and south of the US border considered the group to be a national security threat. “They have huge amounts of money, the latest generation weapons, military-style paramilitary groups and vehicles … and they represent a very severe challenge to the [Mexican] government – above all in small and mid-sized cities where a detachment of 50 cartel operatives can obviously defeat any local police force.”The US Drug Enforcement Administration (DEA) considers the cartel to be as powerful as the Sinaloa Cartel, with a presence in all 50 US states. It is one of the main suppliers of cocaine to the US market and, like the Sinaloa Cartel, earns billions from the production of fentanyl and methamphetamines. Sinaloa, however, has been weakened by infighting after the loss of its leaders Ismael “El Mayo” Zambada and Guzmán, who are both in US custody.El Mancho was originally from Aguililla in the neighbouring state of Michoacan. He had been significantly involved in drug trafficking activities since the 1990s. When he was younger, he migrated to the US where he was convicted of conspiracy to distribute heroin in the US district court for the Northern District of California in 1994 and served nearly three years in prison.Firefighters tackle a blaze in Zapopan, where crime groups set vehicles alight after El Mencho’s death. Photograph: Ulises Ruiz/AFP/Getty ImagesHe returned to Mexico after his release and re-engaged in drug trafficking activity with the drug lord Ignacio Coronel Villareal, alias “Nacho Coronel”. After Villareal’s death, El Mencho and Erik Valencia Salazar, alias “El 85”, created the CJNG about 2007.Initially they worked for the Sinaloa Cartel but they eventually split and for years the two cartels have battled for territory across Mexico.One underworld yarn suggests the split was caused by a Guadalajara narco spilling a glass of hibiscus tea over a rival during a gathering in the city’s east. The apparently mundane incident reputedly prompted a bloody and bewildering sequence of betrayals, gun battles and massacres.Unlike El Chapo, who sought Sean Penn’s help to turn his criminal life into a Hollywood blockbuster, El Mencho prefers the shadows. Few photographs of him exist.Since 2017, El Mencho had been indicted several times in the United States district court for the District of Columbia.The most recent superseding indictment, filed on 5 April 2022, charged him with conspiracy and distribution of controlled substances (methamphetamine, cocaine and fentanyl) for the purpose of illegal importation into the US and use of firearms during and in connection with drug trafficking offences. El Mencho was also charged under the Drug Kingpin Enforcement Act for directing a continuing criminal enterprise.With Associated Press
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Entities

10 identified
§ 06

Keywords & salience

10 terms
el mencho
1.00
drug cartel
1.00
jalisco new generation cartel
0.90
ultraviolence
0.80
mexico
0.70
sinaloa cartel
0.60
drug trafficking
0.60
national security threat
0.50
organized crime
0.50
military-style arsenal
0.40
§ 07

Topic connections

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