Sources close to the investigation claim the mobile phone data was crucial in helping police to identify Terence Darrell Kelly, 36, as a prime suspect.
Henry Dodd lives on the same street where the missing four year old was found imprisoned alone in a locked house in Carnarvon, Western Australia and he spotted vital clues she was there.
Terry Kelly, 36, was arrested by police over the disappearance of Cleo Smith before officers rescued the little girl from a house in Carnarvon, Western Australia.