Night Kills — John Lutz

Frank Quinn is sure he is hunting for a madman: someone who is shooting young women in the heart, defiling their bodies, leaving only the torsos to be found. Quinn, a former NYPD detective, mobilizes his team of brilliant law-enforcement misfits to track the killer. But this shocking serial murder case is turning into something very different. No one knows the true motives behind a rampage of cold-blooded murder--or how much more terrifying this is going to get...