I'm no history expert but I wonder how much of a big real killing someone truly was in those times.
It feels like the kind of thing people would brush off just like that.
@Midoriha You should watch "Justice Bao". Killing another person in that era still got you heavily punished if they can find the proof of murder. The punishment is even harsher than our modern time, from exile and become slave to hanging, beheading, since they followed the teaching: pay with one's life if you killed someone.