That SUCKS worse then words can say...
There are very few things in this word I hate more then a theif... very few...
Karma, my friend will catch up to him. Just keep that running in the back of your head.
I have to say though I did get the pleasure of once catching a their in my car while trying to do the same thing. Granted it wasn't my C but doesn't matter I still got my justice after "roughing him up" a bit I had him sitting on the curb while I called the local cops (my friends) and watching him go to jail with a few shiners.
Needless to say...he hasn't been back
Anywise best of luck to you!