glad everything turned out ok,but you made a few BIG mistakes that could have ended up being VERY costly.
1. Left the door up. Even in the best 'hoods you're gonna have trouble with this one. Where do you think the thieves go when they want to nab some valuable #### quick? the bad 'hoods? nope, the good one's. 'Cause they have nicer #### to steal.
2. Why did your wife call your sister first? No offense, but I'd make sure the first call is to 911. Get the cops there ASAP.
3. Confronting a thief in a closed area, unarmed. If this guy is bold enough to walk into some ones garage or home to steal #### what makes you think he wont shank or shoot you if he's cornered. That could have cost your wife a husband. If you HAVE to confront him, make sure you have the advantage, i.e. a weapon that you are WILLING to use. Your life isn't worth the Beemer that I'm sure is covered by insurance.
4. Having your sister come outside and then attempt to chase him? Again, could have been tragic if the perp was a violent one. First rule if there are women and children around is to get them away from harm asap. Don't need potential hostages running around.
anyway, glad things worked out, but I hope you realize how dangerous/tragic that situation could have been