If you ever see a law enforcement commander, especially a chief of police or the head guy at a department, to on TV and take credit for crime being down understand that they literally have no control over it. Especially so in large cities and during uncomfortable weather months. Why is crime down in the winter and spikes in the summer? Because no one likes to be out in the cold. Simple as that. The moment someone tells you different they are trying to take credit for something which they didn't do.
The fact is that the real way to stop crime and change patterns in the warmest months is very difficult for top commanders to stomach. Because it involves heavy police action which in turn require commanders to back up their officers actions and we all know given today's anti police climate that isn't something which happens regularly. So the citizens suffer because the top commanders don't do what they should do.