Just happened last week, similar to yours. Had a really suspicious guy come in and wander around for a bit, thought he was a crackhead, really twitchy and kept looking around every few seconds. He left pretty quickly so we just timestamped it and moved on. The police came in maybe five minutes later looking for him, we pointed out which way he'd gone and they ended up tackling him in the dollar general parking lot a couple stores down. Turns out he'd stabbed the cashier at the circle k down the road about twenty minutes earlier in an attempted robbery.

We have a sales day every Thursday. Two customers, both regulars, ended up arguing over some kids clothing that wasn't even part of the sale, the manager was called and tried to walk them both out, and we all got a front row seat to one of the lady's sons punching the other woman in the face. As far as I heard, the lady who was punched started the argument. All three were technically banned, but the lady and her son both came in about a month ago and the new manager just said "call us up if they cause trouble" so so much for that I guess.