I'm not is disagreement about that, but I'm thinking the law won't support this guy's actions. That's all.
Roger that.
I doubt the law will support his actions.
Deadly force is not justified in the eyes of the law in most states to prevent property crime. As per the article, the manager wasn't trapped or confronted, he persued the thieves, while displaying a weapon.
If one decides to arm themselves for their defence, it is their responsibility to know the laws covering the use of deadly force.
If you feel deadly force is justified to defend your stuff, work to change local laws (good job, Texas) or take your chances in court.