Forensic police collected ash samples from fires at the Blowholes camp grounds on Wednesday hours after investigators searched the Carnarvon home of missing four-year-old Cleo Smith for the third time since she vanished 12 days ago.
Acting WA Police Commissioner Col Blanch said the “thorough investigation” was something police must do to rule out everyone at the Blowholes when Cleo disappeared as a suspect, including her parents.
“The parents have been nothing but helpful,” Mr Blanch said. “We’ve worked very closely with them, they’ve let us into their home, they’ve let us into their cars, their phones, everything.
“Our job is to eliminate everyone that was at that camp site, and that is a systematic and thorough approach in doing so in any investigation. And that really is the focus of the investigation at the moment.”