You have killed someone. The reasons and circumstances of how you committed this "sin" are mostly up to you. But this was not self defense, and we both know that don't we? For now, you need only concern yourself with how you're going to cover up your dark deed. So, what will you do?

Allow yourself to die at the hands of someone/something unspeakable, or allow the darkness to take over and become something worse to survive? What are you willing to do?