When the vehicle started moving toward the guy who now has internal bleeding from being hit by it, the shooting was justified.
Now a civil lawsuit could be made around them escalating to a violent outcome if it can be proven she was non violently impeding.
In reality if any law enforcement gives an order, lawful of not you should comply, then fight it out in the courts.

Only federal laws, though they have all the citizen arrest power everyone has.

I mean tear gas and crowd control is already illegal due to international treaties, so the judge was actually right in this case.

Nah, all the victims and witnesses already exonerated him.

According to the constitution congress cannot subpoena or hold trials. That's judicial branch territory.