Audiobook "Triptych" by Karin Slaughter

When Atlanta police detective Michael Ormewood is called out to a murder scene at the notorious Grady Homes, he finds himself faced with one of the most brutal killings of his career: Aleesha Monroe is found in the stairwell in a pool of her own blood, her body horribly mutilated. As a one-off killing it’s shocking, but when it becomes clear that it’s just the latest in a series of similar attacks, the Georgia Bureau of Investigation are called in, and Ormewood is forced into working with Special Agent Will Trent of the Criminal Apprehension Team — a man he instinctively dislikes. But then, only 24 hours later, the violence Michael sees around him every day explodes in his own back yard. And, it seems the mystery behind Monroe’s death is inextricably entangled with a past that refuses to stay buried…