Isn't this just eye-for-an-eye, the oldest and most reliable type of justice that has ever existed? (reliable in the sense that it functions even in situations with low practical governance like a remote village or an understaffed nation / area).
Sort of but there were also 6 cities of refuge where the accused could flee for safety. If I remember correctly, there may have been a period of years after which they could no longer be pursued? It’s been a while since I read about it though.