THE mystery surrounding four-year-old boy Gus Lamont's disappearance has deepened as one searcher has made an alarming new claim.

Ex-SES member Jason O'Connell and his partner Jen spent days scouring the South Australian outback, but found no trace of the youngster .

The pair searched day and night for the little boy , thinking he may have been on the move in the evening "because of the heat of flies" when it's light.

Posting online, he explained they used powerful lights to carefully examine every spot in the barren area.

They also listened for foxes and birds of prey, in case "he was in a bad way or if he passed away" and the animals might be swarming.

But after searching the area for over 90 hours, Jason now believes the little boy is not on the homestead at all.

The sea

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