The family of Mark Haines has been grieving for more than three decades since his body was discovered on train tracks in rural NSW, and his parents died not knowing what happened to him.
The Gomeroi teenager was found dead eight kilometres south of Tamworth, in the state's northwest, on January 16, 1988.
On the 35th anniversary of his death, his family are calling for a new coronial inquest, saying it will give them some closure and help other Indigenous families navigate the legal system.