The body of Jasmeen Kaur was found buried at Moralana Creek, north of Hawker, on Monday after detectives were taken to the site by a man known to her.
That man, a 20-year-old from Kurralta Park, was subsequently charged with her murder.
He was remanded in custody after a brief appearance in the Port Augusta Magistrates Court on Tuesday where his identity was suppressed.
Kaur, a carer and nursing student, was last seen alive when she worked a shift at an Adelaide nursing home on Friday.
Detective Superintendent Des Bray said investigators were satisfied she had not died at her own hands but was the victim of a murder.
He said a post mortem examination had reinforced that view.
“We know exactly how she died, but we can’t say,” he told reporters on Thursday.
Bray said it was also possible the victim had been taken by force, with her car found in the car park at her work, and police were “gathering evidence” to show she was stalked.
“We believe it to be extremely unlikely that Jasmeen left willingly with anybody,” he said.
Police have called for anyone with dashcam footage taken along the main highway north of Adelaide on Friday night to come forward.
He said a vehicle the dead woman was believed to be travelling in was caught on safety cameras a number of times, but several hours between those incidents were unaccounted for.
Police were also trying to find her missing handbag, her black shoes and her work identification tag.
The man charged with Kaur’s murder was also charged with failing to notify police of a reportable death.
Court documents allege she was killed between Friday and Monday at Parachilna or other places.
The man was remanded in custody to appear in court again on December 15.
Bray said the man had denied being involved in any way in Kaur’s death.
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