I think the key issue is....LET's STOP THE KILLING! If everyone takes a good look at the 6th Commandment, we would not need any other laws:
Exodus 20:13 "Thou shalt not kill."
Just how much more do you need to explain it?
The problem is, most do not know about the Ten Commandments and so therefore man has to make what I call 'sub-laws' to those that do not fear the Lord. (personally opinion of course).
As for the Laci's law. I see no problem with it. The person that does the killing shouldn't be killing anyone in the first place.