Police dogs and ground-penetrating radar have been used in a renewed search for any traces of a teenager who disappeared more than two decades ago.
Rose Howell was last seen walking towards her home at Bundagen, south of Coffs Harbour on the NSW mid north coast, in April 2003.
The 18-year-old's mother reported her missing when she did not show up for an appointment.
A 2012 an inquest found Ms Howell likely died at an unknown time and place, and the case was referred back to the NSW Police unsolved homicide team.
Deputy State Coroner Paul MacMahon said at the time Ms Howell's mother Malila "would love to think that Rose was alive and well, living under a new identity".
But he found it was more probable than not that she died at or about the time of her disappearance and it was likely at the hands of another or others.
Describing Ms Howell as "strong and independent", he said the teen was eagerly organising her 19th birthday celebrations when she vanished.
Detectives took another look at the case in 2023, bolstered by a $750,000 reward for information about the disappearance announced in July that year.
"Somebody, somewhere has got some idea of what would have happened to her and we'd really like to know," Malila Howell said.
Police searched around a house using dogs and ground-penetrating radar at Repton, near Bundagen, in June.
A Ford Falcon believed to be linked to Ms Howell's disappearance was forensically examined in July.
Homicide Squad commander Danny Doherty said police believed there were people with information that could hold the key to solving Ms Howell's disappearance.
"Her family deserve answers having dealt with the uncertainty of what happened over two decades ago," Detective Superintendent Doherty said on Tuesday.
"The public are reminded that there is no piece of information too small for investigators; your tip could be the missing piece of the puzzle in this investigation," he said.
