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<p>Just outside Australia's country music capital, a young man's body is found on the train tracks, surrounded by shattered Christmas presents and discarded wrapping paper.</p><p>For decades, the mystery has haunted Tamworth. </p><p>After Unravel's first season Blood on the Tracks brought national attention to the case and won a Walkley award, a new inquest was launched.</p><p>Now, Muruwari and Gomeroi journalist Allan Clarke returns to where it all began for Unravel, revisiting Tamworth and uncovering what's happened since, as the long-awaited final chapter of the story unfolds, and major new revelations are heard at the inquest.</p><p>But before then, let's return to episode one. We trace Mark's movements on the night before his death, as he hit the town on a big night out with a bunch of friends, dancing, drinking and having fun. Mark's friends and girlfriend say they left him in the early hours. Just after, a nearby resident hears voices on the street, what sounds like an argument...