What would you do?

I would not wait one moment to call the police and get things resolved, I would not give this person the time of day to beg and plead with me. I do not deal with users with a smile and would be very firm. If you are a user stealing from me you are not a friend of mine in the first place, so good riddance! I think I have pretty good judgment in the first place not to associate with someone like that, I am very choosy with the people that I hang out with.