A $1 million reward has been announced on the one-year anniversary of four-year-old Gus Lamont's disappearance from a remote sheep station in South Australia. The child vanished on 27 September whilst playing near a homestead 40 kilometres south of Yunta, and despite extensive land and air searches has not been located. South Australian Premier Peter Malinauskas described the case as having "shocked our nation" and appealed for anyone with information to come forward. Gus's parents, Josh and Jess, released an emotional video statement marking the first time the father had spoken publicly about the disappearance.

Police believe someone known to Gus, including a grandparent who remains a suspect, may have killed him deliberately or accidentally before he was reported missing. The suspect is believed to live at Oak Park Station, approximately 300 kilometres north of Adelaide, and is neither of Gus's parents. Detective Superintendent Darren Fielke revealed that officers have reviewed aerial imagery of the search area and identified "some anomalies", though he declined to elaborate further. The $1 million reward will be paid to anyone providing information leading to the conviction of those responsible for Gus's disappearance or the location of his remains.