Four year-old Gus Lamont has been missing for a year. Police believe someone knows where he went

One year ago today, a four-year-old boy with blond curls was playing in sand outside his family's outback homestead. What happened next left his family, community and country grappling with ambiguous loss.

An area the size of Singapore in the South Australian outback has been scoured in search of the missing boy, last seen playing outside his house Get our breaking news email, free app or daily news podcast On a sunny Wednesday in a windowless room, a tearful father appears…