Police have provided an update on their weeks-long search for missing four-year-old Gus Lamont after draining a dam at his family’s remote sheep station in Yunta on Friday.

The dam, 600m from the family home and about 4.5m deep, had previously been searched by police divers early on in the investigation but a decision was made this week to go a step further and drain it completely as the mystery surrounding the little boy’s disappearance continues.

Police hoped draining the dam would allow for a “comprehensive visual search”, particularly in areas obscured by underwater vegetation.

Little Gus vanished from his family’s Oak Park Station homestead on September 27, sparking one of the most intensive and protracted search efforts ever undertaken by South Australian police.

He was last seen

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