Specialised radar equipment is being used to scan a property for the remains of a suspected murder victim who vanished more than 20 years ago.
South Australian detectives have renewed their investigation into the disappearance of Port Lincoln woman Susan Goodwin, who was 39 when she was reported missing in July 2002.
Detective Inspector Andrew Macrae said Tuesday's search followed an ongoing review of the cold case and all available evidence.
"It is a tragedy that Susan's family have spent the last 23 years without answers,'' he said.
"Major Crime detectives will continue to actively investigate this and all cold case crimes to provide families with the answers they are seeking and bring those responsible to justice."
Ms Goodwin was last seen about lunchtime on July 19, 2002, after shopping at Coles and Woolworths in Port Lincoln.
Her car was found at 4.45pm on the same day in the driveway of her home on Moonta Crescent, which adjoins Pamir Court, where the new search is focused.
Police have previously said she was murdered "by someone who was very close to her", and they believe the killer still lives in the town.
Previous searches of bushland and scrub surrounding Port Lincoln have proved fruitless.
Ms Goodwin's parents have both died since their daughter disappeared.
Insp Macrae said investigators believed there were people in the local area who had knowledge of what happened to Ms Goodwin.
In 2017, police said a public appeal for information had led to seven persons of interest being cleared by the investigation.
A reward of up to $200,000 is offered for information leading to the conviction of Ms Goodwin's killer and/or information that leads to the recovery of her remains.
