Absolutely no reason at all the officer needed to shoot inside that window.
He did not have a weapon pointed at himself, and wasn't in danger of being run over.
Get your cowardly fat azz back im your vehicle & simply follow him with backup, eventually pulling him over & arresting him.
If you're that scared, in which you have to overreact, then you have no business in the field.
Although, ive never been a big fan of police chases either, because they are putting too many innocent people in danger...