"Today, our agency received preliminary findings from DPS personnel confirming that Regina Santos-Aviles was alone in her backyard when the fire began, which ultimately caused significant injuries and required her transport to the emergency room," Delgado said. Local authorities told the San Antonio Express-News that Santos-Aviles, 35, was on fire when they were called. The Uvalde Police Department and the Texas Department of Public Safety's Rangers Division are leading the investigation. Uvalde Police Chief Homer Delgado previously said that there was no indication of foul play. Regina devoted her profession toward making a difference in her community," Rep. Tony Gonzales said in a statement according to Texas Public Radio.