Can somebody help explain what happened with Edwin?

I am wondering about that too. I was expecting a showdown or something. But all we got so far is that Edwin wounded Ryan and left him intentionally to die. I am not one for violence, but in this case, Edwin should be decapitated or in some form not allowed to live because he orchestrated the destruction of so many lives (eg. Lucaon and Kyon). It is like he disappeared and never existed...(⊙…⊙ )