I live in Brooklyn as well and some things I've noticed: 1. If there's an uptick in crime, police will put up a manned tower for a while. 2. If there's a murd

I live in Brooklyn as well and some things I've noticed: 1. If there's an uptick in crime, police will put up a manned tower for a while. 2. If there's a murder, they will set up a mobile command center in the vicinity. 3. They regularly use helicopters to hunt down suspects. I hear them maybe once or twice a month flying in the area.