Gus Lamont was last seen at about 5 p.m. on 27 September 2023 playing in the dirt near the homestead of the Lamont family’s remote sheep station, located roughly 350 km north‑east of Adelaide in the Mid North region.
Since his disappearance, a massive search effort – dubbed Task Force Horizon – has been mounted, involving almost 400 participants including police, State Emergency Service volunteers, Australian Defence Force personnel, Indigenous trackers and local community members, who have returned to the property a dozen times to scour buildings, disused mine shafts and drained dams.
Detectives have ruled out the simple “wandered off” scenario and also consider an abduction unlikely; the current focus is on the third theory that someone known to Gus may be involved. One of his grandparents, Josie Murray, has been named as a person of interest, though no charges have been laid and she has denied involvement, even suggesting an eagle might have taken the child – a theory investigators have dismissed as implausible.
Family members have spoken publicly about their anguish. Mother Jessica Lamont said a pre‑recorded statement that Gus missed his fifth birthday and his younger brother’s first birthday, while father Joshua Lamont pleaded for anyone with information to come forward. Detective Superintendent Darren Fielke, who leads the Major Crime Investigation Branch, said the reward is intended to bring closure to the family as the first anniversary of the disappearance approaches.
Premier Peter Malinauskas described the case as “shocking our state and nation,” emphasizing the emotional toll on the community. The $1 million reward, announced on Wednesday, is intended to incentivise new leads, and police say they will re‑examine aerial imagery and other anomalies identified in the 706‑square‑kilometre search area.