In Old Testament times God appointed cities of refuge where the manslayer could flee and find sanctuary from the avenger of blood. But it was a provision for those who had caused accidental death, and the authorities in the city of refuge were required to try the case to judge whether the death had been cause accidentally or with malice and premeditation.
Let earthly governments remember that they will be held accountable by God for how much the laws they make reflect the law of God. When they start to deviate away from his law, they put themselves in danger of coming under his judgment as nations, and he has unlimited means of disciplining them and even overthrowing them altogether.