You are sensitive to thefts and keep an eagle eye on customers in your shop. In fact, you are becoming so good at stopping shoplifters that you almost wish you were a cop.
Well, if you are not, then you should be careful with your approach as what you are doing may not be legal. Let law enforcement handle the business of crime and punishment. Macy's department stores in New York found that out the hard way already, according to The Guardian, and it may well pay heavily yet again. Let's look at their handling of thefts and a class action lawsuit filed against them to avoid repeating their mistakes.