The Man Who Did It Doggy Fashion

Death by a dead man. At first sight of the way the naked corpse of a young woman is displayed, DI Kvindstrom vocalises all their thoughts, with, 'I've never heard one praying for it like that.' It gains him a sharp taste of Cnut's disgust, even though his comment is a correct description of the killer's intent with that particular victim. The one that follows implies a more artistic goal, but the woman is just as dead.
The murderer is well versed in forensic science, and leaves no clues, but as the victim count mounts, Cnut decides that artistic perfection, and the desire for fame as an artist, are driving the killer. Those needs apply to dozens of suspects, and one by one they have to be eliminated as the murderer. One name stands out, but that man has been dead for four years. Nevertheless, Cnut becomes more and more convinced that he is the killer - a dead man killing the living.