And in any case, had he succeeded it wouldn't have killed me, so why should I kill him in response?
Are you sure about that? I'm pretty sure he does kill you because he is unable to stop himself once he starts. It's metagaming, I know, but I won't be taking any chances on that in the future for sure. There are no good vampires (or spawns) for this reason alone - dietary choices aside - they have instincst they cannot seem to control. Evil instincst.
