The body of a woman believed to be that of missing health worker Gayle Woodford has been found in South Australia.
Police found the body about 1.5km east of Fregon on Saturday, after Ms Woodford was believed to have been taken from her home early on Thursday morning.
The 56-year-old's ambulance was also allegedly stolen on Thursday morning, and police have charged a 36-year-old Fregon man with theft of a motor vehicle and driving while unlicensed.
Forensic investigators will leave Adelaide on Sunday morning to examine the scene, which is under police guard.
A ground and air search on both Thursday and Friday failed to find the mother of two, with her disappearance declared a major crime.
Ms Woodford normally drove the local ambulance, and its GPS data shows it left Fregon shortly after midnight on Thursday and travelled to Mimili.
In the early hours of Thursday morning, the ambulance travelled via Indulkana to Marla, arriving around daybreak.
Police intercepted the ambulance in Coober Pedy at 10.30am and two men and a woman inside were interviewed.
On Friday, Superintendent Des Bray said police had charged the 36-year-old Fregon man, but he had given police a version of events "that we are not happy with".
The man will be further interviewed on Saturday.