The Rottweiler

The latest victim in a series of apparently motiveless murders is found near Inez Ferry's antique shop in Marylebone. Someone saw a shadowy figure running away, but the only other clues are that the murderer usually strangles his victim and removes something personal, like a cigarette lighter or a necklace.... The activities of the sinister "Rottweiler" will exert a profound influence on the lives of a small group of people, especially when the suspicion emerges that one of them may be a homicidal maniac.