Inmate who ran gun trafficking organization from state prison sentenced in Homeland Security Task Force investigation

Date: August 4, 2026

Contact: [email protected]

Corpus Christi, TX - A resident of Rock Hill, South Carolina, has been ordered by a federal judge to prison for conspiring to "straw purchase" firearms in furtherance of a drug trafficking crime. A straw purchase of firearms involves the illegal purchase of a firearm for or on behalf of others, in this case, dangerous cartel members.

Shawn Bisnauth pleaded guilty May 7.

U.S. District Judge Nelva Gonzales Ramos has now ordered Bisnauth to serve 300 months in federal prison to be immediately followed by five years of supervised release. At the hearing, the court heard that from 2022 through 2024, Bisnauth directed the straw purchasing operation from a South Carolina state prison using a contraband cell phone. In handing down the sentence, the court found Bisnauth responsible for placing firearms in the hands of cartel members in Mexico. The sentence imposed will run consecutively to the remainder of his state sentence.

The investigation began in early 2023 when law enforcement identified Bisnauth as a major supplier of firearms to a drug trafficking organization responsible for importing meth, cocaine, and fentanyl from Mexican cartels for distribution throughout the United States.

Bisnauth arranged for others in South Carolina to purchase at least eight firearms, including .50 caliber rifles and semiautomatic machine guns. He then directed the firearms to be transported to Texas and exchanged with the drug trafficking organization for narcotics, which individuals in South Carolina then distributed.

He 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 Ashley Martin and Tyler Foster 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 Naval Criminal Investigative Service with the U.S. Attorney's Office for the Southern District of Texas leading the prosecution.

IRS-CI is the law enforcement arm of the IRS, responsible for conducting financial crime investigations, including tax fraud, narcotics trafficking, money laundering, public corruption, healthcare fraud, identity theft and more. It is the only federal law enforcement agency with investigative jurisdiction over violations of the Internal Revenue Code. IRS-CI has 16 field offices located across the U.S. and maintains an international presence through attaché posts abroad.