Gus is believed to person wandered from nan property, which is astir 40km southbound of Yunta, astir 5pm past Saturday.
An extended hunt has been ongoing aft his family were incapable to find him and has grown much hopeless each day.
Police returned to nan family's spot to analyse what is now nan presumed decease of nan four-year-old boy.
Officer spent much than 2 hours speaking pinch family and taking photos astir nan property.
Police said each nan grounds truthful acold suggests nan boy's disappearance is not suspicious.
A friend of nan family said retired against what she described arsenic "hurtful conspiracy theories" astir what had happened to nan four-year-old.
"Stop pinch nan conspiracy theories," family friend Fleur Tiver said.
"This kid has not been taken. In mentation there's a nationalist road, but successful reality there's six gates connected that roadworthy retired to nan highway."
The squad of officers appeared to re-trace and grounds Gus's past known movements astatine nan spot past night.
The accusation will shape portion of their ongoing investigation.
Locals successful nan region person been near saddened and baffled by nan disappearance.
"It's difficult to judge really he could conscionable disappear, successful a short circumference of their farmyard, house, station," section Braithe Selleck said.
"A small boy, 4 years old, is not I wouldn't person thought, conscionable sewage excessively acold away."
Before it was ended, nan hunt for Gus spanned 7 days and an area of almost 500 quadrate kilometres, involving craft and teams connected nan ground.
Each time astatine slightest 50 group were involved, but they recovered thing isolated from a footprint.
Everyone's thoughts now pinch nan parents, and family, suffering a unspeakable loss.
"Even nan full community, you know, it's a very adjacent knit community," Selleck said.
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