Police in Western Australia are trying to determine if more than one person was involved in the alleged abduction of Cleo Smith.
The 4-year-old was allegedly taken from the family tent while camping at Quobba Blowholes, 75km north of Carnarvon, on October 16.
Cleo was missing for 18 days until she was rescued by police from a house in the West Australian town.
Detective senior sergeant Cameron Blaine said on Monday the investigation was going well.