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    Dateline Episode Trailer: Facing the Music

    00:45

    When a young schoolteacher in Pennsylvania is murdered, her friends wonder if the killer will be caught. Following years without an arrest, investigators discover a new tool that may finally help unlock the murderer’s identity. Can police work fast enough to catch the suspect? Or will the killer slip away again? Andrea Canning reports Friday, May 31 at 10/9c on NBC.