He told the Chiefs wife that her plate was expired so she could not drive the car. Not sure exactly how that was said, but he would be in a fair position to say you can drive the car and I will ticket you or you can take a cab and pick it up tomorrow. if he was gonna write a ticket and prevent them fromm driving then that is not justified. I know the Chief was being a dick, but by job discription the cops deal with dickheads all the time. The actual phyical altercation with the first cop I agree was ok and he showed restraint. The second one is guilty of assault. First one is guilty of condoning it and not stopping it.
I think you should do some reading on laws. It's obvious that you don't know how they are applied based on the corrections I've already made to your assumptions.
Cops can ticket for no insurance AND tow the vehicle. Public access area. Ever occur to you if the cop was being a nice guy and didn't ticket and tow, that the female or chief could take a taxi around the block and come back to the car and drive it way? What you think should have happened, and what the real options are under the law are two completely different things.
You don't have any street smarts. Might not be your fault because you grew up in a good neighbourhood and lack the sixth sense of knowing how devious people can be. However, you need to be alive to the fact that lots of people aren't fine upstanding citizens. For those of us who grew up in a tough neighbourhood, it's a lot more obvious the Chief got what was coming to him.
It's also obvious you've never been in a fight, or know how to fight, because you're oblivious to how the Chief was acting.
Again, the charges were stayed, not dismissed.