"murder"... That's defined as killing someone who you shouldn't have killed, according to a set of laws.
In some cases, it's ok to kill someone. Those situations have legal definitions and juries are explicitly allowed to authorize a "justified killing" at their discretion even when the law doesn't specifically allow it in that situation. All they have to do is return a "not guilty" verdict, and it's based on the "reasonable person" principle.
FWIW, $.01 is enough in my book. Looters are parasites no matter how you cut it, and parasites need killing, period. Even "varmints" have a position in ecological cycles, but human parasites do nothing but drag everyone else down. I'm unable to feel sorry for the parasite any more than I'm able to feel sorry for killing a mosquito that's sucking blood out of my arm.
And NEVER just try to wound someone if you have to shoot them. That just gives them a chance to sue you. If you kill them, their family can sue for wrongful death but not for other intangibles like pain and suffering. If you're gonna shoot them, you sure as hell better kill them or your life is going to be hell fighting the endless lawsuits. A crippled criminal gets far more sympathy from a jury than the family of a criminal who is trying to get paid because their scumbag relative got shot stealing. Any gun owner in California should know this rule cold because juries in california are screwy that way. Someone falls through your skylight at midnight? If they live to walk out the door, you're liable for them busting their bellybutton falling through your ceiling. But if you shoot them dead, it's a justifiable shooting in self defense and there won't be a lawsuit.
Sure, flame away, but it's the cold hard truth. Sorry if you don't like it.