And the Police helio camera can zoom in on a number plate and read it from a surprisingly long way away, such is the resolution of modern digitals. They can also access the Police computer system direct from the chopper. Plus they can get ahead of the vehicle, drop lower and get a facial shot of the driver!
In other words, if you are doing something naughty and you see a Police helio, just stop and give up - you don't have a cat-in-hell's chance of getting away!