I've got this game in a bundle, and I've really enjoyed it! Thanks. My case was relatively quick, the playthrough took only 1 hour total.
In my game, a young and very ambitious Occult Detective Harriette Johnson has solved the case of ebon wood effigies. The criminal was the grand master of the Mages' Guild named Oscar, who was performing illegal rituals, and the people killed were either his rivals or accidental witnesses. The effigies was an attempt to scare people into not crossing his path.
Although the case was very stressful for Harriette: at one time she herself became Oscar's target, and only her skill of hiding helped her to stay alive.