WARNING: Aboriginal and Torres Strait Islander readers are warned the next article incorporates photographs of deceased individuals.
The physique of 17-year-old Stephen Smith was discovered on railway tracks between Quirindi and Werris Creek in October 1995.
The Indigenous boy's demise was topic to a coronial inquest, which discovered Stephen died on account of a number of accidents sustained when he was hit by a practice.
An investigation into the demise of Smith is being reviewed after contemporary info was offered to detectives from the Oxley Police District.
Oxley Police District Crime Supervisor, Detective Appearing Inspector Matthew O'Hehir, stated detectives nonetheless imagine there are members of the group with info related to this investigation.
"We've got lately obtained new info that means Stephen might have been the sufferer of a separate, unrelated incident earlier than his physique was discovered on the practice tracks some hours later."
Police at the moment are interesting for help from the general public to assist resolve the chilly case.
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"Stephen was final seen in Quirindi at a while after midnight presumably hitch mountaineering in direction of Werris Creek," O'Hehir stated.
Police say the knowledge offered has not made it clear whether or not the incident was intentional or unintentional.
Investigations are ongoing.