A cunning killer hides in plain sight. A troubled teenage girl has been charged with the grisly murder of her stepfather. The evidence is damning: Emily was found alone at the scene with blood on her hands, and an incriminating e-mail she wrote outlines a murder plot identical to the method of the brutal slaying. But deputy district attorney Julia Chandler believes her niece is innocent, and she's determined to keep the promise she made to protect...