Could Private Machine Networks Replace Police?

Your son is hanging out with friends behind the VR theatre when someone pulls a knife: they're being robbed. He hits a panic button on his phone, and a nearby drone is instantly dispatched. Less than 30 seconds later it's in the alley, sirens wailing and lights flashing, recording everything to be transmitted to the police. The technology for that scenario exists today. Add a dash of image recognition, or take it another step and put a taser (or a miniaturized version of the heat ray) on the device, and you have the automation of emergency response services.