Opening Moves by Steven James (Patrick Bowers Files, Book 6)

FBI agent Patrick Bowers' first major murder investigation begins in Milwaukee, 1995. In a city still relling from the crimes of Jeffrey Dahmer, a woman's body is found with the lungs removed. Local cops think a Dahmer copycat is on the loose. But Patrick Bowers, working as a homicide detective for the Milwaukee Police Department, sees from the timing and location of the crime that this is not a copycat at all, but a killer with an entirely different agenda.