"48 Hours" preview: "What Happened to Rachael?"
A year after a well-liked teacher was killed in a small Pennsylvania town, people close to her are trying to figure out why an arrest still hasn't been made. The lack of progress in the investigation is being blamed on the underfunded and understaffed police department in the town. "48 Hours" correspondent Erin Moriarty joined CBSN to talk about her report.