Here's an interesting theoretical scenario.
A man is climbing out of a car to a small, dimly lit parking lot outside of a train station. It is nighttime, the man has got his train tickets all set and about $500 in cash secretly stashed away in his inside pocket. He's about to catch the train for a short but well deserved vacation, and is recklessly hasty about it. The parking lot looks to be empty save for a beggar with a cup in front of the station doors. But it is not empty, for no sooner that he starts heading to the doors a hooded stranger comes out of the shadows with a gun pointed at him.
The stranger quietly and almost calmly (as though he's done this several times before) says that if the man gives him his wallet, no one would get hurt. The man is nervous as hell but tries to remain calm, reaching into his front pocket for his wallet. He slowly hands it over to the stranger, but fearful that the stranger would try to take the extra $500 in his inside pocket, the man suddenly lunges forward at the stranger and pushes the gun away. A violent struggle breaks out as they both try to wrestle for the gun, both sets fingers dangerous pressing against the trigger. The beggar sees the commotion and quickly calls out to a police officer inside the station. The officer rushes over with a gun drawn and shouts "FREEZE! PUT THE GUN DOWN!". Just then, however, the gun being fought over goes off and kills the policeman instantly. More police immediately show up and arrest both of them.
The stranger is charged and given a death sentence for the killing of the police officer during a felony crime.
My question for you is, what should happen to the first man? One could argue that he acted out of self-defense when he attacked the stranger, and that no blame can be pinned on him on him at all. He was being held at gunpoint and tried to protect himself and his possessions when the accident occurred. Another could say that he had not intended for the gun to go off when he attacked the stranger in an attempt to subdue him, and thus classify it as involuntary manslaughter. Yet another could go as far as to call it murder in a lesser sense, because had he given the stranger his wallet instead of grabbing the gun, it would not have gone off at all, or that the man had intended to shoot the stranger when wrestling for the gun and had been the cause of it going off to accidentally kill the officer instead.
What would you classify this killing as, in respect to the first man?