Josie Murray, grandparent of Gus Lamont, has been charged with gun offences at the property where the child went missing. 

South Australian Police said officers had been conducting inquiries and a renewed search at the Lamont family’s remote Oak Park Station, about 40km south of Yunta, in connection with the disappearance of Gus.

‘As a result of a previous search at Oak Park Station, Task Force Horizon detectives have today arrested a 75-year-old from Grampus and charged them with firearm offences,’ a spokesperson said on Monday.

‘They have been bailed to appear in the Peterborough Magistrates Court on May 6.’

Acting Officer in Charge of Major Crime Investigation Branch Detective Inspector Andrew Macrae said that the charges are not related to the disappearance of the four-year-old.

He added that the charges were also not connected to an incident with a journalist who attended the property in October 2025. 

Gus went missing from the 60,000ha property on September 27 last year and, despite the largest police search operation in the state’s history, no trace of him has been found. 

Detectives recently revealed that a person known to Gus was now considered a suspect in his disappearance and suspected death. However, they stressed that Gus’s mother and father, Jessica Murray and Joshua Lamont, were not suspects.

Police have launched a fresh hunt for evidence in the disappearance of four-year-old Gus 

Gus disappeared on September 27, 2025, after his grandmother said she last saw him playing on a mound of dirt at their property around 5pm

No arrests have been made or charges laid over Gus’ disappearance.

Gus’ grandparents Shannon and Josie Murray have both enlisted the services of high-profile Adelaide defence lawyers.

They said they were ‘devastated’ by the police announcement and insisted they were still cooperating with the investigation.

Police have not said either is a suspect and It is not uncommon for witnesses in criminal cases to seek legal advice. 

In November, a search of six uncovered and unfenced mine shafts located between 5.5km and 12km from the homestead lasted three days.

‘The inspection of the mine shafts … did not locate any evidence to assist in the investigation into Gus’ disappearance,’ a police statement said.

‘Several of the shafts were relatively shallow and could be visually inspected but the remainder were up to 20 metres deep and specialised equipment was required to complete the searches.’

Before that, authorities drained a dam in late October, ruling out the possibility Gus had drowned.

Authorities on Monday began a two-day search at the remote station where he vanished in September (pictured in October)

Josie and Shannon Murray hired separate lawyers after police said a family member ‘who resides at Oak Park Station’ is considered a suspect

It took police about three-and-a-half hours to drain 3.2million litres of water from the 4.5metre-deep dam, which is 600metres from the homestead.

The initial search for Gus included survival experts, SES crews, local trackers, multiple air support units and mounted police.

Aerial imaging within a 10km radius of the homestead had also been done.