I must confess I have not totally read or totally understood the Bible's Books of Law, or Pentateuch. When I do read them, I must remember they come from a time and culture much different from ours.
Part of God's law was how manslaughter was treated. I don't understand that kind of "amazing grace." If one of my "babies" was killed, no matter the circumstances, I'd probably be screaming for blood. But how infinite our God is! And how high his bar of integrity and welcome.