Well here's a scenario. You're out and about and confronted by a person wearing a hoodie with his hand stuck in the right pocket (as though he had a weapon). He demands your money. You reach toward your back pocket where most people would carry their wallet and instead produce a Bond Arms derringer. Upon seeing the weapon, the adversary turns just as you fire. Your bullet catches his spinal cord and leaves him alive, paralyzed from the neck down. Naturally, it turns out that he was unarmed.
He shows up in court in a wheel chair with various attendants ministering to him.
And then there's you. You had a weapon, plus a backup, plus several magazines..plus documented training...and belonged to several firearms websites where you had stated repeatedly what you would do if given the oppportunity. You were a loaded gun just waiting for the chance to show your stuff, and this poor guy in the wheelchair (unarmed) became your once in a lifetime chance to show what a hotshot you are. You gunned him down with his back turned and show no remorse whatsoever.
Sadly, that's the way lawyers play. You're the ball they bat back and forth.