Exactly a month to the day since little Gus Lamont vanished from his family’s remote sheep station, new theories have emerged about just how far he might have gone.

The four-year-old was last seen around 5pm on Saturday, September 27, playing on a mound of dirt near the homestead — about 40km south of Yunta in South Australia’s Mid North.

WATCH ABOVE: Expert claims Gus could be outside search area.

When his grandmother called him in just 30 minutes later, he was gone, according to his family.

What followed was one of the largest search operations in South Australian history. Police, SES volunteers and the Australian Army scoured more than 60,000 hectares of harsh terrain by air and ground.

A second week-long search earlier this month at the family property failed to find any new cl

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