God did not create death. God gave us our life. He alone has the disposition of it. He determines both its beginning and its end. Therefore He sharply forbids killing any one without His command.
Murder is premeditated killing.
Cain and Able Cain said to his brother, let us go to the field, then he killed him. This was planned premeditated murder. And it came to pass in the morning, that David wrote a letter to Joab, and sent it by the hand of Uriah. And he wrote in the letter, saying, Set ye Uriah in the forefront of the hottest battle, and retire ye from him, that he may be smitten, and die. Here we see a perfect example, it was the Ammonites who killed Uriah, the husband of Bathsheba.