One year has passed since four-year-old Gus Lamont disappeared from a remote South Australian property, with police renewing their appeal for information and a reward of up to $1 million now available as investigators continue searching for answers.
Gus disappeared from Oak Park Station, about 43 kilometres south of Yunta, on 27 September 2025.
Despite one of the largest and most intensive missing-person searches ever undertaken by South Australia Police, Gus has never been found. South Australian Police
Gus disappeared from the family property
Police were initially told Gus had been playing outside the Oak Park Station homestead at around 5pm.
When a family member went outside approximately half an hour later, he could not be found.
Emergency services were alerted that evening, beginning an extraordinary search effort across the surrounding outback landscape. South Australian Police
What began as a missing-person search has since developed into a major criminal investigation.
In February 2026, SAPOL formally declared Gus's disappearance a major crime. South Australian Police
One of SAPOL's biggest missing-person searches
The scale of the operation has been enormous.
Police say 11 separate ground searches have been conducted across 30 days, supported by aerial searches involving PolAir, drones and aircraft fitted with specialised camera equipment. South Australian Police
Earlier stages of the operation involved 163 SAPOL personnel and another 230 people from outside SAPOL, including SES volunteers, Australian Defence Force personnel, an Indigenous tracker and community volunteers. South Australian Police
Search teams have examined vast areas around the homestead.
That work has included searches of dams, mine shafts, waterways, creeks, wells and bores.
Specialist aircraft captured imagery extending as far as 15 kilometres from the homestead, with some of the footage subsequently analysed using specialised artificial-intelligence software. South Australian Police
Despite the scale of those efforts, no evidence has been located that explains where Gus went.
Police investigation changes direction
As the investigation progressed, detectives considered several possibilities surrounding Gus's disappearance.
SAPOL says exhaustive investigations have not produced evidence supporting either the theory that Gus wandered away from the property or that he was abducted by an unknown person.
Task Force Horizon is now focused on the possibility that someone known to Gus was involved in his disappearance and suspected death. South Australian Police
No person has been charged in relation to Gus's disappearance.
Police have repeatedly stressed that the investigation remains active.
$1 million reward announced
In the days leading up to today's anniversary, authorities announced a reward of up to $1 million for information about the case.
The reward is available for information that leads to the conviction of the person or people responsible for Gus's disappearance and/or the recovery of his remains. South Australian Police
The announcement has already generated new information.
Within roughly a day of the reward being announced, Crime Stoppers received 34 telephone calls and two emailsrelating to the case.
Police said another nine Crime Stoppers calls had been received earlier in the same week as public attention returned to Gus's disappearance ahead of the anniversary. South Australian Police
Detectives are assessing the information and say reports will be investigated where appropriate.
Parents continue to plead for answers
Gus's parents, Josh and Jess, have repeatedly appealed for anyone with information to come forward.
Their message has remained simple: even something that may appear insignificant could help investigators understand what happened to their son.
In an appeal released by police, the family said they wanted to bring Gus home and finally understand what happened to him. South Australian Police
The anniversary has renewed attention on the enormous uncertainty faced by Gus's family and the communities surrounding Yunta and South Australia's Far North.
ABC News reported today that people in the region continue to remember Gus and hope the new reward may finally produce information capable of moving the investigation forward. ABC News
Investigation remains active
Task Force Horizon continues to investigate Gus's disappearance.
Police have previously returned to Oak Park Station as weather conditions changed, including after heavy rain and flooding exposed areas that could be searched again.
A May search examined more than 30 kilometres of waterways and creeks, along with several wells and bores, but uncovered no new evidence. South Australian Police
SAPOL has said it will continue following new information and intelligence as it becomes available.
Anyone with information urged to come forward
Police are appealing to anyone who may know something about Gus's disappearance to contact Crime Stoppers on 1800 333 000.
Information can be provided anonymously.
The $1 million reward remains available under the conditions announced by police. South Australian Police
One year after Gus disappeared, his whereabouts remain unknown.
For his family, investigators and the South Australian community, the hope remains that someone holds the information needed to finally provide an answer.
BitWaves News will continue to follow developments in the investigation into the disappearance of Gus Lamont.