This is why many states and cities are trying to ban police chases, except in the most extreme cases of a violent criminal being chased. Too many innocent people are dieing because the police think they are John Wayne and have to chase after everyone then proceed to put several clips in to them.
Not to knock on all police officers, because there are some great ones...but I don't see why we should be surprised by this. Ever cop I personally know got in to it simply for the "macho" factor of carrying a gun and a badge. If a person already has that mentality, wouldn't you think they already have a predisposition to do crazy stuff like going the wrong one down one way streets, far too fast, to be the "hero"?