AND limit future thefts by the same people, and likely dissuade future thieves.
If the chances of getting caught for this sort of crime were non-zero, even if the repercussions were a heavy fine, it would hopefully make people think twice before getting involved in it.
Let's say you finally manage to impound his car. Now there's an article about how people's lives are being ruined because of fines and mere misdemeanors. We're back to square one.
Yeah, I know, that might just be shifting the problem - he could take up online fraud, or burglary, or mugging instead.