Wrong. You’re alleging you can’t see the black guy stepping back away from the white guy?
Really?
What if the the black guy’s victim can’t see that as a result of the violent assault he just received?
Pretty sure he isn’t watching form the corner of the roof. Pretty sure he’s watching from his ass on the ground with a violent man standing over him preparing to dish out some more.
Once the gun was drawn, the decision to fire was already made.
The thug’s opportunity to back up was before he pushed the man to the ground and then further advanced on him.
Too bad, so sad.