Detective Superintendent Darren Fielke gave an update on the investigation after detectives and specialist officers returned to Oak Park Station this week to scour new locations.
Gus was playing in a mound of dirt at Oak Park station, under the care of his grandmother Shannon Murray as his mother Jessica and grandparent Josie were tending to their flock 10km away.
Searchers have once again began to scour the harsh South Australian landscape in their search for Gus Lamont, who went missing at his family's Oak Park Station homestead.