South Australian police have deployed technology previously used in a high-profile murder case and ruled out a footprint as belonging to four-year-old boy Gus Lamont, who went missing on his family’s outback sheep station.

Augustus “Gus” Lamont was last seen playing on a mound of dirt at about 5pm on Saturday, September 27, on his family’s Oak Park Station homestead.

The boy was reportedly left alone for half an hour before his grandmother attempted to call him inside, only to find him missing.

The family searched for three hours before calling police, with state emergency services, helicopters and Aboriginal trackers descending on the sprawling 60,000 station for 10 days searching for the boy.

SA Police Acting Commissioner Linda Williams revealed on Tuesday a special drone with infrar

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