How about an executioner that flips the switch that kills a man strapped down to a table?
So if a sniper shoots an unarmed enemy general while he is reviewing the troops, is the sniper guilty of murder?
By using the term 'enemy general', can I assume I am at war with this general? Of course, then, the answer is quite simple. Obviously, no, there is no murder that has taken place. The sniper is operating within the law.
How about an executioner that flips the switch that kills a man strapped down to a table?
Murder is the unlawful killing of a human with intent. The executioner is carrying out a lawful order.