It's Auora and should probably be considered another country in-itself. It was disowned by Denver and the rest of Colorado years ago.
Regardless, it has a really shitty history of police behavior and this was likely fairly low on the scale of what Aurora would consider violent behavior.
Aurora's only function is to catch the off-gassing from Commerce City so it kinda puts the "fart police" in better context. It's also probably why the police there are also a little "special".