South Australia police have arrested a 75-year-old on unrelated firearm offences as they launch a new search for evidence in the disappearance of four-year-old Gus Lamont. The arrest stems from a previous search at Oak Park Station, Gus's home, but is not linked to his disappearance or a prior incident involving media, police said.
Gus went missing on 27 September 2025 from his family's remote sheep station, sparking one of the largest searches in South Australia's history. Initially believed to have wandered off, the case was declared a major crime in February after police identified inconsistencies in family accounts and a suspect withdrew cooperation.
Detective Superintendent Darren Fielke stated that the suspect, who lives at Oak Park Station, is not one of Gus's parents. Police have ruled out the theories of Gus wandering off or being abducted by a stranger, focusing on someone known to him.
Taskforce Horizon detectives returned to Oak Park Station on Monday for a two-day search for evidence. The 75-year-old, from Grampus, has been bailed to appear at Peterborough magistrates court in May.
