When Mark Haines dies, news of the teenager's death spreads quickly through Tamworth and beyond. His family are on summer holidays in different parts of the state and rush home to be together in grief.

While the family mourns and Mark's body is in the morgue, their town is in full party mode. The Tamworth Country Music Festival is on and Australia is celebrating 200 years of colonisation. For Mark's uncles, it feels like the death of a young Aboriginal boy is the last thing on anyone's mind.

The police come up with a theory that Mark might've killed himself … but the family aren't buying it. In the days and weeks ahead, his uncles return repeatedly to the train tracks looking for answers. They're worried the police have missed vital clues and they become convinced Mark met with foul play.

In their quest to disprove the police theory, the family find an unlikely ally. The railway worker who first found Mark's body on tracks is just as convinced the evidence out there on the tracks just doesn't add up.

Blood on the Tracks is the first ever series we made for Unravel, back in 2018.

But we're re-releasing it now with a new episode because the NSW Deputy State Coroner is currently holding a fresh inquest into this case.

Keep listening to the end of this series to find out about the new information that's recently been revealed in the inquest hearings.

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.