A new photo has emerged of missing South Australian woman Colleen South at a petrol station on the day she was last seen.
The 58-year-old was captured on CCTV at Sunraysia Petroleum at Berriwillock, in Victoria's Mallee region, on Sunday, July 3, about midday.
Ms South tried to purchase fuel at the unattended petrol station on the Calder Highway but had trouble using the self-service machine.
According to a member of Ms South's family who has seen the footage, another person who was also paying for petrol at that time noticed her struggling and kindly paid the $10 amount Ms South owed.
Victoria Police has confirmed the CCTV footage forms part of their investigation into the disappearance of Ms South, who had left her Adelaide home the day before, on July 2.
Witnesses have reported last seeing Ms South driving her 2006 Hyundai Getz towards Wycheproof, in Victoria's Mallee.
The photo at the service station was taken four hours before Ms South's car was spotted by a farmer, crashed into a ditch just outside of Bunguluke, 15 kilometres east of Wycheproof, and about 40 minutes away from the petrol station.
Jacket mystery
Ms South's possessions were found laid out 20 metres away from her car, which was locked. The items included bedding and other personal effects, as Ms South had been in the process of moving house between two Adelaide suburbs at the time of her disappearance.
Her Samsung phone, however, was found three weeks later in a playground in Port Noarlunga, south of Adelaide, with its SIM card missing.
Family members have said the bright coloured jacket Ms South was wearing at the petrol station, was not uncovered in items found near her car.
The jacket is different to the description of a black and white jumper that a witness had previously reported seeing her in.
In a statement, Victoria Police said the physical search for Ms South had been scaled back.
"However we continue to investigate the circumstances surrounding her disappearance including any reported sightings and or new information that comes to light," the statement said.
Ms South's family has not ruled out foul play and is planning to return to the Wycheproof area this week to continue searching for her.
