Leader of drug trafficking organization linked to Mexican cartels sentenced in Homeland Security Task Force case

CORPUS CHRISTI, Texas - A 28-year-old Mexican national who illegally resided in Cleveland has been ordered to federal prison for his role in a conspiracy involving large quantities of cocaine, announced Acting U.S. Attorney John G.E. Marck.

Elmer Vargas-Serrato pleaded guilty Oct. 28, 2025, to conspiracy to distribute five kilograms or more of cocaine.

U.S. District Judge David S. Morales has now ordered Vargas-Serrato to serve 201 months in federal prison. Not a U.S. citizen, he is expected to face removal proceedings following his imprisonment.

Vargas-Serrato was the head of a drug trafficking organization responsible for moving cocaine from cartels in Mexico to Houston and Dallas. The cocaine was then distributed to other U.S. cities in the states of Illinois, New York, Georgia and North Carolina. The organization also transported firearms to Mexico to arm the cartels.

Vargas-Serrato was responsible for sourcing cocaine from the Mexican cartels and directing the organization's U.S. operations. He was tied to approximately 41 kilograms of cocaine seized across three states.

A search warrant of a residence tied to Vargas-Serrato resulted in the discovery and seizure of cocaine, a stolen firearm and multiple drug ledgers discussing the movement of narcotics and firearms. Authorities also located titles to numerous vehicles used during the transportation of narcotics.

Vargas-Serrato has been and will remain in custody pending transfer to a Federal Bureau of Prisons facility to be determined in the near future.

Assistant U.S. Attorneys Tyler Foster, Liesel Roscher and Ashley Martin prosecuted the case.

This investigation and prosecution was part of the Homeland Security Task Force initiative established by Executive Order 14159, Protecting the American People Against Invasion. The HSTF is a whole-of-government partnership dedicated to eliminating criminal cartels, foreign gangs, transnational criminal organizations and human smuggling and trafficking rings operating in the United States and abroad. Through historic interagency collaboration, the HSTF directs the full might of U.S. law enforcement towards identifying, investigating and prosecuting the full spectrum of crimes these organizations commit, which have long fueled violence and instability within our borders. In performing this work, the HSTF places special emphasis on investigating and prosecuting those engaged in child trafficking or other crimes involving children. The HSTF further utilizes all available tools to prosecute and remove the most violent criminal aliens from the United States. HSTF South Texas comprises agents and officers from Immigration and Customs Enforcement Homeland Security Investigations; FBI; Drug Enforcement Administration; Bureau of Alcohol, Tobacco, Firearms and Explosives; U.S. Marshals Service; U.S. Postal Inspection Service; Department of Transportation; IRS Criminal Investigation; Interpol/Department of State and the Naval Criminal Investigative Service with the U.S. Attorney's Office for the Southern District of Texas leading the prosecution.