(Texas Scorecard) – A Houston-based former member of the Texas National Guard who once served on the front lines of Operation Lone Star is now facing up to 10 years in prison after a federal jury convicted him of human smuggling.
Mario Sandoval, a 27-year-old Houston resident and former national guardsman, was deployed to the U.S.-Mexico border as part of Operation Lone Star, the Texas-led initiative launched in 2021 to curb illegal immigration. The operation mobilized both the Texas National Guard and Department of Public Safety.
Despite being released from his official orders, Sandoval remained in the Rio Grande Valley and, in July of last year, began smuggling illegal aliens north of the immigration checkpoint. Jurors were shown text messages confirming Sandoval’s coordination in the smuggling operation—including his role arranging drivers and alerting others to law enforcement locations. Surveillance footage also placed him near the checkpoint during the times those messages were sent.
Sandoval was discharged from the Texas National Guard in October 2024. Although he claimed the texts were taken out of context and that no conspiracy existed, a jury found him guilty after a one-day trial and less than an hour of deliberation.
The case was part of Operation Take Back America—a federal initiative targeting human smuggling and illegal immigration.
U.S. Attorney Nicholas J. Ganjei for the Southern District of Texas called the case “an unthinkable violation of public trust,” adding, “Thousands of brave men and women, military and civilian alike, work tirelessly to keep our border secure. It is truly disheartening that one bad apple chose to betray his fellow soldiers, his fellow citizens, and his country by engaging in human smuggling.”
According to the Department of Justice, Sandoval now faces up to 10 years in federal prison. Sentencing is scheduled for October 22.