Why do so many Canadians believe that Ontario is part of the United States? Does it have something to do with the phasing out of grade 13? As you were told when you posted, this is a U.S. site addressing only U.S. legal issues.
If you want to try to obtain police reports from a police agency, you can inquire with that agency about their procedure for requesting reports or investigate your Province's equivalent of a "freedom of information act". As should be quite obvious, if your friend was never caught or confronted, his name won't be on the reports. If he gives you a list of places, dates and times, along with what he stole, I suppose you could go through some painstaking research, but come on.
How about telling your friend that (a) this is his problem, not yours and (b) to stop stealing.

