GK: Alerting police to situations before they happen or go too far can help. We had odd characters of all ages at all hours in/out of 2 apts owned by brothers. We suspected but couldn't prove drug dealing (hard drugs). Some characters were so whacked out, they could barely walk. We told local police and they began patroling our block and making their presence obvious. Within a month, no more characters. Both brothers sold their apts in the next year.

A few years ago we had an owner who said residents were out to get her. She'd pin them in the elevator and say, "I'll get you before you get me". We told the police about her. She trapped an owner's teenage daughter in the laundry one day and was slapping her. Another owner called the police. They came just as she was about to hit the girl with a wrench that was by the sink. She was arrested for assault and it took 2 years but we got her evicted. Our bldg isn't Trump Tower but it's a nice bldg. You never know. So a few words to the police can't hurt.