Don't do this.1. Get a good look at them if possible.
2. Fire a shot into the ground (not pave).
3. Yell, "Freeze! Get on the ground! Get on the f!@#ing ground!".
4. Hold them at gunpoint until the cops show up or watch as they run off. You can't shoot them just for trying to steal your stuff.
That's what I would do but I'm not a lawyer.
http://bayoushooter.com/forums/showthread.php?t=18546