Shaken : a Jack Daniels thriller / J.A. Konrath.

Enhanced descriptions from Syndetics:

Chicago cop Jacqueline "Jack" Daniels has chased and caught dozens of dangerous criminals over the course of her career. But she's about to meet her match.When Jack wakes up in a storage locker, bound and gagged, she knows with chilling certainty who her abductor is.He's called "Mr. K," and more than two hundred homicides have been attributed to him. His victims have died in the most horrible ways imaginable: he is the essence of evil. Some think he's just an urban legend, but he's very, very real. Jack has tangled with him twice in the past, and both times he managed to slip away.Now Jack will finally have the chance to confront the maniac she's been hunting for over twenty-five years. Unfortunately, it won't be on her terms. In less than two hours, Mr. K is going to do to Jack what he's done to countless others. And Jack is going to learn that sometimes the good guys don't win...