Here are some more interesting perspectives:
Government: If a terrorist his strapped up, we have information that she is planning on killing thousands in a mall and is walking to the mall now, is it murder or execution if we remotely explode the bombs prematurely, killing only that person?
Private: Premeditated murder. What is the appropriate consequence? Who should decide the law? A judge or the people through their elected representatives?
Accidental killing involving negligence: For example, DUI, intentionally driving a car with known faulty brakes, not taking down a diseased tree leaning over a person's property.
Self-defense: The recent castle defense laws passed in several states: Should a person even be charged with manslaughter when he kills an armed person who has broken into a house at night?