The homeowner did everything wrong. There isn't a single thing that he did that made any sense.

First, you don't go outside to engage a thief. Call the cops and let them deal with it. You're not in any danger, so why put yourself in danger to protect the few things you have stored in your car? Senseless in all situations.

Second, you never, ever, ever fire a warning shot. What warning are you giving, that you have a gun? Duh, the bad guy can see that. Are you warning that you'll shoot the bad guy if he comes any closer? You've already shown that you won't do that because you didn't shoot him when you legally could have, as he approach with a weapon displayed. So all you've done is illustrate that you're not serious about defending yourself, turning yourself into a target.

Which is exactly what happened here. The homeowner let a criminal with a deadly weapon get to touching distance and almost lost his life. This guy should sell all his guns and stop pretending that he's ready to protect himself. He clearly isn't.

Thanks to OldBrownHat for posting this. It's a superb example of what NOT to do.