haha, this situation gets brought up in the CHL class in Texas. There was a court case that actually says YES it is completely your right to stop with lethal force someone running away with your property OR your neighbors. However, the ethical delima becomes was that $300 in jewelry WORTH taking another humans life in that moment?? The answer should always be no - no matter the level of scum a person may be, there life is worth more than a $300 box of jewlery. Where you draw the line is up to you. And believe me, it's a line you must draw and stick to. Having a plan on when it's going to be ok and when its not is a big part of the challenge.
As Brandi did say though - no disrespect mean. Just driving home a very important point!