"She's got issues," is what they said about Riley. As a first year teacher, I wasn't sure what that meant, but my instincts told me that Riley was not going to be easy. She came in to my lesson smoking a cigarette, speaking on her phone, and gaining the eternal admiration of her fellow 15-year-old classmates. Five years later and Riley is in prison. The statistics said that was likely to happen. But why was Riley's fate so inevitable? Why do some...