AN ABORIGINAL family has called for witnesses to bring closure to their grief as mystery still surrounds the death of a beloved relative 32 years ago.
Don Craigie made a statement outside the Tamworth police station on the 32nd anniversary of the death of nephew Mark Haines.
Mr Haines' body was found on railway tracks south of Tamworth and his death was initially ruled as suicide, but his family maintain he met with foul play.
Police have reopened the investigation and the state government has offered a $500,000 reward for fresh information.
"The $500,000 reward is still available for information into Mark's death," Mr Craigie said.
"The reward is life-changing for those with information - and, for us, the information means closure as we can move on with our lives after all these years of not knowing what happened to our boy Mark."
The push for justice in the Haines case has been supported by NSW Greens MP David Shoebridge, who said the case represented "the two-tiered justice system experienced by so many First Australians".
"It must be a catalyst for change," Mr Shoebridge said.
"This is a time to reflect on a life cut brutally short, and what we must do to reform the police and courts so that we can finally say that black lives matter in this country."
Oxley Police District acting Superintendent Kylie Endemi said she believed there are people who know what happened to Mr Haines.
"Mark's family have been dealing with the uncertainty of what happened to him for over 30 years; they deserve some closure and peace," Superintendent Endemi said.
"We believe there are still people around who know exactly what happened to Mark but are either afraid - or unwilling - to share that information with police."