Murder carries a different connotation than killing.
A police officer, a soldier in war, and a person defending themselves or defending the life of another, have a God given right to kill the attacker. This tell us that before we were born, God had already determined the date of our birth, and the exact day and hour of our death. Each year, in the world, there are approximately 51 million deaths. And each one of those deaths are commanded by God. In essence, God kills each one of those 51 million.