Duty to meet with equal force?

Recently, the Arizona Sun ran a story about the pending trial of a man who shot and killed an alleged attacker. Give it a read - it's short and plaintext. I'll wait...

Done? Ok. As there were no witnesses, I can see how the prosecutors could want to test the facts before a jury. I have no argument actually with that - and there may be facts unrevealed to the press that contradict the defendant's story. For the sake of this discussion, let's set aside the "who is funding the defense" controversy (which I have to say, really is technically irrelevant in our system of justice - How are the defendant's actions changed by what organization subsequently steps up to fund the defense? A defendant should not be judged by who helps fund the defense; that if anything is utterly unjust.).

That aside, there are some peculiar statements in the article. Here, I think is the big one:
After several warnings for [alleged attacker] to stop, [defendant] shot [alleged attacker] three times in the chest at close range. [defendant] was not harmed, and [alleged attacker] did not have a weapon in his hands at the time he was killed. . . other options were available.

My comments in the... um, comments. Discuss.