Mafia 31. Twilight Dances.

and for some reason, the clue seems more than obvious to me... but it wouldn't hurt to hear what Haven has to say. maybe he'll decide to help the city a little? although, so far, we haven't seen that from the murderer. and if Haven turns out not to be a vengeful figure, but someone with a peaceful role, then we have an Angel who can bring him back to this world.

Added 2 minutes later

Only the Mafia will go into NNV on a night like this.

unfortunately, yes. but the clue against Morny is weak... there don't seem to be any elements that can be attributed to him. and by killing the murderer, we'll lose one murder per night. can the Mafia only commit one murder?