POLICE have confirmed a $1 million reward remains on offer for information regarding to the murder of Lee-Ellen Stace as the anniversary of her disappearance passes for another year.

Homicide Squad detectives are continuing to appeal for information into the unsolved murder of the Brooms Head teenager 23 years ago

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Ms Stace, aged 16, was last seen on Tuesday, September 2, 1997, when she finished work at a Yamba Road supermarket - a job she had started a week earlier.

Her family reported her missing, which sparked a large-scale police and community search operation, and six weeks later, her remains were located in the Yuraygir National Park near Brooms Head.

Grafton detectives conducted a thorough investigation at the time. However, no one has ever been charged for her murder.

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A number of suspects were named during the 2009 coronial inquest into her suspected murder, and the coroner recommended the investigation be referred to the Homicide Squad for future investigation.

$1M reward on offer 23 years after Stace murder

Last year, a $1 million NSW Government reward was announced and remains on offer for information that leads to the conviction of those responsible for her death.

The investigation remains the responsibility of the Homicide Squad's Unsolved Homicide Unit under Strike Force Delaware.

Homicide Squad Commander, Detective Superintendent Danny Doherty, said detectives have received incredible support from the community throughout the course of the investigation.

"Following the announcement of a $1 million reward in June last year, detectives have conducted further investigations and re-examined evidence received over the past two decades," Det Supt Doherty said.

"As with all unsolved homicide investigations, anyone in the community that may have fresh information to assist us in progressing our inquiries is urged to come forward."

Ms Stace's parents Peter and Robyn spoke at the press conference announcing the $1 million reward in 2019.

Mr Stace said the family would never give up or lose hope of finding her killer or killers and bringing them to justice.

"We miss her and love her with all our waking moments," he said. "She was a typical teenage girl who enjoyed life."

He thanked the local community for its support over the years.

"They've been there to support us through tough times, but also the Victims of Homicide Group, they've helped out great," he said.

Mr Stace said it was now up to the members of the community who had information about his daughter's fate to come forward.

"Come forward to the police please," he said. "Don't be scared."

For anyone that may have information relating to the case, they are urged to contact NSW Police or Crimestoppers.