Four-year-old Gus was last spotted playing on a dirt mound around 5 p.m. on Saturday, September 27, at his family’s homestead in Oak Park Station.

Despite an intensive investigation, police have yet to uncover any leads regarding the boy’s disappearance, although they have emphasized that there is no evidence of foul play involved.

A renewed search effort, which commenced yesterday, will focus on examining three abandoned mine shafts on the property. These shafts had not been previously identified by investigators and the search is anticipated to last three days.

Former homicide detective Gary Jubelin, who is not participating in the current search, mentioned that the police are entering what he refers to as “the grind part” of the investigation.

“At about 60 days in, I believe the investigators will be reviewing all the information they have and pursuing every possible avenue,” Jubelin commented on the Today show.

“But the fact that they’re searching so far away from where Gus first disappeared suggests to me they’re looking at possible intervention.”

He said police had always indicated they would investigate “all possibilities” in their search for the missing boy.

The mine shafts, which are uncovered and unfenced, are located 5.5km and 12km from the homestead where Gus was last seen.