Seems more like a marketing stunt. Emphasis by me:
The PUG will eventually be allowed to drive the streets of Miami-Dade unmanned after a healthy amount of community feedback, the sheriff said. But a deputy will be in the front seat as the vehicle drives itself — for at least the first year.
I think I've spotted a Ford logo on the car. And to my knowledge they're nowhere near autonomous driving as of today?! Wikipedia says they're at SAE level 2, while something in the general direction of autonomy would be level 4 or 5, with the added complexity that they'd need special software and AI training for emergency situations. Which probably doesn't exist either. So I seriously doubt it'll be able to do any proper police work in a year. It might be able to autonomously grab a box of donuts from their favorite store by then. And I suppose that could make their day better. But more than that is going to prove difficult... And the drone might be useful, as far as I know drones can really help with police and fire and rescue tasks.