Okay, but they obviously were in pursuit of an armed suspect. You're operating on a false assumption that they didn't know who the guy was. That's not a factor in this case. In this case, they shot a fleeing armed suspect. What's the argument against it? If that guy gets away, he could theoretically endanger more lives. Is that a better response? Let them run away, put more lives in danger, and don't shoot until you're staring down the barrel of his gun?
I don't understand what you're arguing here, as pertains to this case. It was a good shoot, yes?