PLANO, Texas - An Oklahoma man has been sentenced to federal prison following an investigation by the Homeland Security Task Force in the Eastern District of Texas, announced U.S. Attorney Jay R. Combs.

Steven Mark Moore, 27, of Yukon, Oklahoma, pleaded guilty to straw purchase of firearms and was sentenced to 60 months in federal prison by U.S. District Judge Sean D. Jordan on May 28, 2026.

According to information presented in court, in 2022, an investigation revealed firearms purchased at various pawn shops and gun shows were linked to various crimes in the United States as well as deadly cartel-related shootings in Mexico. The investigation identified Moore as a source of funding used to purchase the firearms from legitimate sources to illegally resale the guns at an inflated price to individuals involved in criminal activities.

This case is part of the Homeland Security Task Force (HSTF) 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 United States law enforcement towards identifying, investigating, and prosecuting the full spectrum of crimes committed by these organizations, 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 Dallas comprises agents and officers from the Federal Bureau of Investigation (FBI) Dallas Field Office; U.S. Department of Homeland Security, U.S. Immigration and Customs Enforcement, Homeland Security Investigations - Dallas (ICE-HSI); Drug Enforcement Administration (DEA) Dallas Field Division; Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) Dallas Field Division; Internal Revenue Service, Criminal Investigations (IRS-CD; United States Postal Service, United States Postal Inspection Service (USPIS); Transportation Security Administration, Federal Air Marshal Service (FAMS); United States Secret Service (USSS); Department of State, Bureau of Diplomatic Security (DSS); TEXOMA HIDTA; and U.S. Marshals Service (USMS) Eastern District of Texas with the prosecution being led by Eastern District of Texas Assistant U.S. Attorney Matthew T. Johnson.

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