It doesn't matter, I've witnessed the difference growing up. The perceived threat from a suspect it heightened by the race of the suspect.
Erm no. Firing your weapon is an option if you believe the suspect to be a mortal danger to yourself, colleague, or the general public.
Not acceptable firing on an unarmed person, who was suspected, key work being suspected of committing a non-violent crime. Whilst he was running away with his back turned. I believe he was sitting in the passenger seat of the car so it is not even clear if he even committed the crime of DUI.
Now he did resist arrest, so yes this is a crime, one which validates the force displayed by the officer whilst he was running away NO!