Detectives have still not spoken to the mother of a schoolgirl whose body was found stuffed inside a barrel because she's under guard at a hospital and 'hard to approach'.
The nine-year-old's body was found on Tuesday night in scrub near the Colo River - an hour from where she disappeared on a private property in Mount Wilson, in the NSW Blue Mountains.
Police revealed in a press conference on Wednesday they'd used CCTV to track down a 32-year-old man accused of her murder.
They allege the man discussed buying sandbags and boat fuel before later travelling to the riverbed where the girl's body was later found.
'(There were) a number of telephone conversations, to purchase a number of sandbags - 20 kilos sandbags from the hardware store - to fuel a boat and then try and float that boat on the water at one of the one of the docks in inner Sydney,' Deputy Police Commissioner David Hudson said.
The girl's mother and mother's fiancé reported her missing to police on Friday morning, claiming they last saw her on Thursday afternoon.
The nine-year-old girl was last seen on Thursday but was reported missing on Friday morning
Daily Mail Australia can reveal shocking new detail about the nine-year-old girl's alleged murder as a 32-year-old man prepares to face a Sydney court on Wednesday morning
But the police fact sheet tendered in court on Wednesday indicates police believe there are contradictions to that timeline.
Police have alleged she was killed sometime between 7pm on Tuesday, January 11 and 10am Wednesday January 12.
There has been a significant delay in speaking with the girl's mother because she remains in hospital under guard.
'The mother is currently under healthcare and is difficult to approach,' Deputy Police Commissioner David Hudson said.
'She's under medical supervision, but when doctors allow, we will be talking to her.'
Mr Hudson said it was too early to speculate as to whether the accused had an accomplice.
'At this stage, we have no evidence to support whether the accused acted alone... However it is still early days,' he said.
There has been a significant delay in speaking with the girl's mother because she remains in hospital under guard. 'The mother is currently under healthcare and is difficult to approach,' Deputy Police Commissioner David Hudson said
Police made the grisly discovery near the Colo River in Sydney's west on Tuesday night. A child's remains, which are yet to be identified, were found in a barrel
The 32-year-old man was arrested at an apartment in Surry Hills on Tuesday night. He will face court on Wednesday
Police were investigating a number of 'anomolies' they identified in the accused's initial testimony, which included giving two separate versions of events in the lead up to the girl's disappearance.
Mr Hudson said through tracking the movements of a car they seized via CCTV, they were able to establish certain facts as to the movements of the man charged.
'Thursday afternoon, he purchased a number of sandbags from a hardware store,' he confirmed, adding that petrol was also used in an attempt to float a small boat which was later deemed inoperable.
'We then tracked the individual back to the location where we found the body.'
The child's doting grandparents, who have fulltime custody of her in Coolangatta on the Gold Coast, have been notified.
More details about her death and final moments are expected in the coming days after her post-mortem results are shared with detectives.
Police had already scoured the Colo and Hawkesbury Rivers after information that a boat was used in the hours after she vanished, but returned to the scene following new information on Tuesday