In the Spotlight: The Button Man by Wayne DePriest

                
                             http://www.lulu.com/shop/wayne-depriest/the-button-man/paperback/product-21285890.html
Kindle edition:
http://www.amazon.com/Button-Man-Wayne-DePriest-ebook/dp/B00GGPZCQ0/ref=sr_1_1?s=books&ie=UTF8&qid=1384014398&sr=1-1&keywords=wayne+depriest The Button Man takes a button when he takes a victim. And he takes a victim whenever he wants. The authorities don’t know he exists, though he leaves them ample evidence of his existence. They just don’t see it. As a rookie patrolman, Detective Dan Finney met The Button Man in Maria Kuroshchepova’s apartment. Finney discovered her body, tucked neatly into her bed. A decade later the case is still unsolved and Detective Finney has seen the handiwork of The Button Man again and again without knowing it. Saddled with a partner who seems hellbent on destroying both their careers and a girlfriend who just might take what sanity he has left, Finney gradually becomes aware of a sinister force loose in the city, a man who has gotten away with murder time and time again. As the picture of The Button Man becomes clearer, Finney comes face to face with his worst nightmare.