User blog comment:Looperreallyreallysucks/Pure Evil Proposal - Killer (Blood Trail)/@comment-2059440-20190916053223/@comment-34055410-20190916112632

The killer is very sadistic, and given the way he kills (killing people for trying to protect one of his victims, forcing a person to watch her lover die, and so on), it’s unlikely he has moral agency issues. And given how much fun he seems to be having while doing what he does, it’s the most likely that he kills for amusement.