The suspect was revealed to be someone who lived at the property where Gus lived — but was not either of his parents.
According to The Advertiser, both of Gus’ grandparents have engaged top Adelaide lawyers to represent them.
Gus’ grandparent Josie Murray is understood to have hired criminal lawyer, Andrew Ey, while his other grandparent Shannon Murray is being represented by defence lawyer Casey Isaacs.
Mr Isaacs confirmed to The Advertiser that he was acting for Gus’ grandmother, and said: “We have been co-operating but we won’t be commenting.”
There is no suggestion that either Josie or Shannon Murray were involved in Gus’ disappearance.
Little Gus was last seen by his grandmother playing on a mound of dirt at Oak Park Station, 43km south of Yunta on September 27, 2025.
Major crime Det-Supt. Darren Fielke also revealed that there had been “inconsistencies and discrepancies” relating to the timeline and version of events.
“A person who resides at Oak Park Station has withdrawn their support for police and is no longer co-operating with us,” he revealed.
“On 14 and 15 January, this year, Task Force Horizon investigators attended Oak Park Station and executed a search warrant.
“Further comprehensive forensic search was conducted of the Oak Park Station homestead. A number of items were seized, including a vehicle, a motorcycle, and some electronic devices.
“All of these items are now subject to forensic testing. The person who has withdrawn their co-operation is now considered a suspect in the disappearance of Gus.
“I do want to stress, however, that Gus’ parents are not suspects in his disappearance. You appreciate at this time I cannot make any further comment about the suspect, given that this is now a criminal investigation and a declared major crime.”
Det-Supt. Fielke said that police believed the suspect was known to Gus.
The investigation is still ongoing and no charges have been laid
