The homeowner is a good marksman and cool under fire. To hit all three suspects and kill all three...wow, amazing. And not one shot from the “teens” found its mark even as they were first to open fire.
Most likely a veteran...
They count on waving a gun around and a few random shots to properly intimidate their victims.
It usually works. But there are other times when they run up against a citizen who has not only armed himself but has also trained.
I try to remember that there's always someone out there who's crazier and/or more skilled than I am. Doubt that this ever entered their alleged minds.