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.

For decades, the mystery has haunted Tamworth. 

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.

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.

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, and a car driving dangerously.

But the next few hours remain a mystery. How did Mark end up on the tracks?

This season of Unravel is intended to be listened to as a whole. If you haven't heard all the episodes, you shouldn't draw any conclusions, because you haven't heard all the sides of this story.

To binge more great episodes of Unravel, the ABC's award winning investigative true crime podcast documentary series, search 'Unravel podcast' on the ABC Listen app (Australia) or wherever you get your podcasts.

There you'll find previous series covering various crimes and crime-related topics including solved and unsolved murder cases, forensic analysis, gangland crimes, love scammers, con-artists, drugs, terrorism, neo-nazis, and miscarriages of justice — all investigated by some of Australia's best reporters and people who know the story best.