Forensic scientists in Adelaide continue to examine the human bones found by a member of the public in sand hills near Nora Creina in October.
A police spokesperson said an outcome could still be months away.
“Initial testing of the remains is inconclusive and substantial further testing will be required which will take up to three months at the earliest before a result can be obtained,” the spokesperson said.
“There are no signs of violence on the bones so there is nothing obvious to say it is suspicious, but that does not necessarily mean it is not.
“Once we can determine the origins of the bones or the identity, we will be able to assess this.”
Back in October, local police had immediately attended the remote area and were joined by Adelaide-based forensic investigators at the scene the following day.
The bones were then taken to laboratories in Adelaide for further scrutiny by anthropologists.
Police have urged anyone with information to contact Crime Stoppers on 1800 333 000.