Generally speaking, would you say that the "Ends justify the means"? An evil act that has an unintentional positive outcome is not an evil act? Does it work, in your estimation, the other way around too? A righteous act that has an unintentional negative outcome is no longer righteous, but evil?
No to both of your irrelevant questions. BTW, wrong and evil are not the same.
Trying to understand why you are using your hindsight to retroactively judge a split second reaction taken to defend one's own life. you can't say "but he was unarmed" unless you are subscribing to the philosophy that those particular ends vilify those particular initial reactions.
Since the victim was unarmed, it is counterfactual to claim otherwise. Why any sane civilized person would claim otherwise is unimaginable to me.
As to the rest of your response, people are judged on split second decisions all of the time - both in criminal and civil cases and outside of the legal system. The jury in this case used hindsight to judge the shooter on a split second decision. It just happens to be a verdict you agree with. So please stop with this "hindsight" and "split second decision" hypocrisy.