According to WTHR, this "gun owning, permit having man" followed "teenagers that he thought were up to no good."
In order for it to have been "Zimmermanesque", he would have had to have called the authorities, and done nothing more than keep an eye on the miscreants.
Running up on them, with firearm drawn, and yelling "freeze!" is nothing more than the SJW's fever-swamp wet dream about what happened.