Cleo Smith search: Police Commissioner Chris Dawson says ‘someone knows’ what happened to Cleo

WA’s top cop has revealed police are “painstakingly” going through every vehicle movement out of the camp site Cleo Smith vanished from, issuing a fresh appeal for information to “crack open the case”.

“We do believe that someone knows that something,” Police Commissioner Chris Dawson said.

“Cleo just can’t simply disappear from that tent without a third party, another person or persons knowing.

“If you know, or your suspect someone you think that their behaviour has changed since that weekend, then bring it information forward.

“That’s the sort of information that might crack open this case.”

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Mr Dawson said detectives were working through “an implication and elimination process”, tracking the four-year-old’s last movements before she disappeared.

“We will go to the last localities, in this case it has been at the family home, and we want to ensure that that’s forensically checked,” he said.

“We’ve got thousands of data points that we will be analysing, also physical specimens that we will collect.

“This will take quite some time to go through.”

Mr Dawson confirmed that police do not believe Cleo has left the State, with the strict border restrictions limiting movement out of WA.

“There’s no information to suggest that she’s not (in the State),” he said.

“We’re not eliminating any sort of movement at this point in time... but there’s no information I’ve been briefed on to say that she’s no longer in the State.”

Mr Dawson, who is currently WA’s Vaccine Commander, said police were working around the clock.

“Its a tragic situation but we’re leaving no stone unturned,” he said.

“This is the largest police jurisdiction by landmass in the world, so it’s a very, very large geographic area ... that’s why we want the community’s assistance.”