Speculation erupted online after the reported killing of Nemesio Oseguera Cervantes, widely known as “El Mencho,” with some commentators alleging direct involvement by the United States government. However, officials on both sides of the border have not confirmed any such claim.

The controversy gained traction after conservative political commentator Laura Loomer posted on X (formerly Twitter), asserting that the U.S. was responsible for eliminating the alleged leader of the Jalisco New Generation Cartel (CJNG).

Her comments quickly circulated, fueling debate over whether Washington had a direct operational role in the mission that resulted in Oseguera’s death.

What Did Laura Loomer Claim?

In her post, Loomer stated that El Mencho “was eliminated by the Trump administration this morning,” urging supporters to celebrate what she framed as a decisive action against organized crime.

She further suggested that the United States had orchestrated or directly supported the operation. Loomer also speculated that if Mexico’s president, Claudia Sheinbaum, had acted alone, she could face retaliation from cartel elements.

Great job US Special Forces!

Despite the lies being spread by @EmbamexEUA, the US did in fact play a role in the elimination of a senior Cartel leader today in Mexico.

We all know the Cartels run Mexico.

These Mexicans can’t do anything without US support.

🇺🇸

— Laura Loomer (@LauraLoomer) February 22, 2026

“I think it’s pretty obvious the US was involved. Everyone knows the cartel runs Mexico,” Loomer wrote. She went on to claim the operation was “clearly US-supported” and speculated about the Mexican president’s security situation.

Despite the viral nature of her statements, no official evidence has been presented to substantiate claims of direct U.S. military involvement.

What Authorities Have Confirmed

According to government sources cited by Reuters, El Mencho was killed during a military operation conducted by the Mexican Army in the western state of Jalisco. Federal forces reportedly launched the operation targeting one of Mexico’s most wanted figures.

Mexican officials have stated that the mission was executed by domestic security forces. While bilateral intelligence cooperation between Mexico and the United States is longstanding — particularly in counter-narcotics efforts — authorities have not confirmed that U.S. personnel were involved on the ground.

The United States had previously offered a $15 million reward for information leading to Oseguera’s arrest or conviction, underscoring Washington’s interest in dismantling CJNG operations.

Why El Mencho Was a Top Target

As leader of the CJNG, Oseguera oversaw one of Mexico’s most powerful criminal networks. The cartel has been accused of trafficking significant quantities of cocaine, fentanyl, methamphetamine and other narcotics into international markets.

Under his leadership, the organization expanded aggressively, becoming a dominant force in several Mexican states and earning a reputation for heavily armed confrontations with security forces.

His reported death marks a major development in Mexico’s ongoing battle against organized crime.

Even President Trump said the cartels run Mexico.

“President Sheinbaum @Claudiashein is NOT running Mexico, the CARTELS are running Mexico."

"It's the cartels…I've asked her numerous times, would you like us to take out the cartels? 'No, no, no. President, please.'"

This… https://t.co/ruE323kOiu pic.twitter.com/1yu1p4L5uX

— Laura Loomer (@LauraLoomer) February 22, 2026

Violent Aftermath Across Jalisco and Beyond

Following news of the operation, unrest was reported in multiple areas. Videos circulating on social media appeared to show burning vehicles, road blockades and armed confrontations between suspected cartel members and security personnel.

Authorities in Jalisco urged residents to remain indoors as security forces responded to incidents of violence.

The situation prompted the U.S. Embassy in Mexico City to issue a travel alert advising American citizens in Jalisco and surrounding states to shelter in place and monitor official guidance.

Mexico’s Official Position

President Claudia Sheinbaum and her administration later confirmed that the operation was carried out by Mexican forces. Officials have not acknowledged any direct U.S. military participation.

While intelligence sharing between the two countries is common under bilateral security agreements, public statements thus far indicate that the operation itself was executed by Mexican authorities.

The absence of confirmed U.S. involvement has not slowed online speculation, but government sources maintain that the mission was domestically led.

A Story Still Developing

As investigations continue and more details emerge, the full scope of international cooperation — if any — may become clearer. For now, claims of direct U.S. military action remain unverified.

What is certain is that the reported death of El Mencho represents a pivotal moment in Mexico’s fight against organized crime — one that has already triggered political debate and heightened security concerns across the region.

FAQ

Did the United States kill El Mencho?

There is no official confirmation that U.S. forces directly participated in the operation. Mexican authorities say the mission was carried out by their military.

What did Laura Loomer claim?

She alleged on social media that the Trump administration eliminated El Mencho and suggested U.S. involvement in the operation.

Who confirmed El Mencho’s death?

Government sources cited by Reuters reported that he was killed during a Mexican military operation in Jalisco.

Why was El Mencho a major target?

He led the CJNG, one of Mexico’s most powerful and violent criminal organizations involved in international drug trafficking.

Did Mexico acknowledge U.S. involvement?

Mexican officials have confirmed the operation but have not stated that U.S. forces were directly involved.