Maybe there was a Charizard in the back seat of the cop car?
There are many ways to get caught committing a crime, but the worst way to explore the back of a patty wagon is to crash straight into it while doing something illegal like looking at your phone. Obviously the officers wanted to know what the driver's backstory was. Unfortunately, his reason had nothing to do with any semi-excusable reasons such as getting lewd pictures from his girlfriend or seeing how much his winning lottery ticket is worth. Nope, this driver was playing Pokemon Go, although in a car a bit less cool than Alejandro Solomon's.
Fortunately nobody was hurt badly, but this driver seems like a perfect candidate for the Nurburgring Pokemon Go taxi.