ambulance to area hospitals, and one person self-transported. "Thankfully he was stopped when he was, because it could have been so much worse," Washko said. "This mall is pretty busy this time of year." Washko said that the vehicle was still inside the mall as of Saturday night. He said that the area was secure, but urged the public to stay away. He added that initial reports of a possible active shooter were false. Texas DPS will lead the investigation into the incident, the agency said. The Texas Rangers Division, which is part of Texas DPS, will also be involved.