If Snow Hadn't Fallen (Lacey Flint, #1.5)

Just weeks ago, a Jack the Ripper copycat terrorized London, leaving London police officer Lacey Flint scarred both physically and emotionally. Still recovering from the ordeal and technically off-duty, Lacey almost ignores it when she hears a call for back-up as she's heading home. But she's close by and figures they could use her help. She could never have expected the horrible crime she would witness on arriving at the scene, or the frightening twists the case would being to take.