
You know, seriously, I don't see what you think is defensible about this. "Second chances..." blah blah blah. It's a case where a guy was lying face down on the concrete, and was shot in the back and killed.
This is not a guy fleeing the scene of a crime.
This is not a guy who had got off a murder rap on a technicality, or raped a nun.
It's a guy who had been up on a weapons possession charge, which may or may not have even been known when he was being subdued. IIRC the video shows him turning his head to see his friends, trying to talk to the officers involved. And then he's shot in the back and killed. Earlier reports from eyewitnesses stated that it looked rage-induced, as the officer stopped, stood, drew his weapon and fired, point-blank, into the prone, unarmed, defenseless man's back.