A 14-year-old youth has been charged in eight sexual assaults across the city dating back to early summer - a string of attacks that occurred months after he was arrested in early spring on a similar charge and then released. While declining to call the teen a serial rapist, Capt. John Darby, commander of the Special Victims Unit, expressed amazement at the scope of the crimes. In an interview this afternoon, Darby said, "Obviously, the number of cases is extraordinary when you're talking about a 14-year-old." The youth, whose name was not released because of his age, has been in...