I don't think a whole lot can be deduced from the most recent kill. It could easily be true that Tratorix or Motep are Jotun and that was why there was only one kill on N1. When they then realized that suspicion would be thrown on them by killing more than one person, they then refrained from other kills to lessen the damage to them. It could also easily be the case that the Jotun have simply chosen to only kill one person per night for their own reasons, as noted by Andres above. I really don't feel like one of these options is stronger than the other, so I'm inclined to give more weight to other factors for the moment.

Vote: Motep exclusively for his retaliatory vote, not for anything to do with the kills. I'll probably change this vote later, but consider this my method of scolding people for being unhelpful.