He did not die because he stole. He did not die because he ran. He died, because he was held face-down on the hot asphalt for 20 minutes by five security guards.
The article is screw up. Was it security guards, or Loss Prevention employees? Big difference. LP attempts to prevent theft of product, security guards provide security for parking lots, employees, etc.
According to witnesses, Stacy Driver ran out of the store and was pursued by Walmart loss prevention employees.