The first murderer got a light sentence, but after the reset, the rules changed:
> “Whoever sheds human blood, by other humans must his blood be shed; for in God’s image God has made humankind. (Genesis 9)
But vigilante retaliation is still out of place:
> But be afraid if you do wrong because government does not bear the sword for nothing. It is God’s servant to administer punishment on the person who does wrong. (Romans 13)