A $250,000 reward is now on offer for information that may help identify the driver of a vehicle that hit and killed a Riverina teenager.
Braydon Worldon's body was found on River Road, Wantabadgery, on December 19, 2018, by a passing driver.
This week, Deputy State Coroner Elaine Truscott opened an inquest in the manner of his death.
On the final day of the inquest, the NSW Government and NSW Police has announced the reward in the hopes it may bring some new information to light.
Wagga Police Inspector Adrian Telfer said the tragic incident is still being investigated, and officers refuse to give up.
"[It's for] anyone who knows something and comes forward with information that ultimately leads to the arrest and conviction of the driver," he said.
"What we are here to do today is appeal to that person or persons to please come forward.
Detectives from Riverina Police District established Strike Force Dunstable to investigate the circumstances surrounding the boy's death.
They've confirmed Braydon was last seen alive during the evening of December 18, 2018.
Investigations lead police to believe he may have been hit by a heavy vehicle fitted with a bull bar, travelling along River Road.
Inspector Adrian Telfer said it's not just about knowing who the person responsible is, but any piece of information helps.
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It could be knowing someone who had a damaged bull bar fixed in the area around that time or knowing somebody driving along that road between December 18 and 19.
"It's been a terrible, terrible incident - we have seen a 15-year-old on his birthday killed, and the driver leaving the scene without rendering any assistance at all," Inspector Adrian Telfer said.
"Ultimately, the greatest reward is being able to give the family more answers about what happened that night."
Minister for Police and Emergency Services, David Elliott, said he hopes this reward will help encourage anyone with information to come forward and assist police find much-needed answers for the family and friends of Braydon.
"This young man had a life ahead of him that was tragically cut short in December 2018," he said.
"I hope that the NSW Government's $250,000 reward could be the incentive that is needed to encourage people to come forward and report to the police to help find answers for Braydon's family.
"Any information, no matter how small, could be the piece that police need to solve this case."
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