There are several things to consider when serious incidents happen and when infractions happen. But first remember that either can be deadly.
We have to keep in mind the initial offense and what are the likely reactions for a normal person involved. A high speed pursuit in itself will cause everyone's adrenalin to bump way up. The officer is now in complete "RED ZONE" attitude. He is in danger by having to pursue the suspect, but the suspect is also endangering civilians. The cop is fired up.
Location of the incident has alot to play with these things too. Chino or Mayberry? If I was in a Mayberry type of town or community, I'd be a bit more relaxed for an infraction stop, than I would be in Chino. What's the gang situation, does the suspect appear to be the gang type in dress or actions? Is the driver a John Doe regular looking person and offers no obvious danger.
What kind of call was the Deputy on just prior to the pursuit? A violent call where he had to fight with someone to subdue them? Or maybe he just left the "Ye Olde DoNut Shoppe".
All kinds of things in the environment matter to how we all react to something. The point should be made that officers no matter where they are, need to always be in control of themselves and every situation. Once they lose control of either, things will get more dangerous.
This brings to mind the good old boy situations where some cops just have no business being cops at all. Cops jobs are to serve the people and to protect the people. To bad not all of the people want that. So cops have to more aggressive in some situations and some locales, just to stay alive.
It's easy to judge cops actions on Monday mornings, but once you get a real taste of the day to day work lives of these officers, you realize making the call of who did right or who did wrong is a lot tougher.
Fact is I can only speak from west coast cop experience, as there is a difference in attitude and methods of operations across the country. Generally the same, but not always. The FBI will tell you that from the get-go.
I see the case going to Federal court for prosecution of the Deputy for a Civil Rights violation.
At 100MPH plus it would take a minute or three at least to catch up. At that point other officers including shift Super would be responding also both behind him and in front predicting his forward route. His radio traffic may tell the whole story. If I understand it right this was inside a city and not like back-up was on the other end of the county.
Evidently enough time lapsed to chase and stop the car as well as order the occupants out face down. If an officer knew his backup was in route and he was the only officer on scene I would think he would rather have them lying face down until he had help on scene.
Four shots fired? At close range?
Ridiculous..........
"I see the case going to Federal court for prosecution of the Deputy for a Civil Rights violation."
Lenient. BTW, what do you do different from the target in this case if a cop tells you to get up?