That link is wrong. Store employees cannot detain shoplifters. Only loss and prevention and security can.
Actually, they can. Most stores have policies against it, but legally an employee can stop a shoplifter. There's no special law that designates loss prevention (which, by the way, is a separate function with no real presence at most retailers; a rep from the department might show up a few times a year) or security (which most retailers don't have anyway) as being the only people who can detain suspected thieves.
Detain, not stop. Those are two completely different words with two completely different meanings.
Except not in this context. Detaining and stopping have the same function and effect in this example. Further, if you're going to make a claim that it's unlawful for them to do so despite a legal blog already okaying it, I would expect you to at least present a source.
Detaining means holding a person such as taking them to a back room until cops get there. ---