The girl disappeared from her tent on October 16 while camping with her parents near Carnarvon in a remote part of Western Australia.
The 36-year-old man suspected of kidnapping Cleo Smith, a 4-year-old Australian, is said to have "acted alone" and is due to be charged today Thursday, police said.
Injured after his arrest, the man was hospitalized.
"He is back at the police station and is being questioned," Rod Wilde, the head of the investigation, told reporters.
The police, who considered that this kidnapping would not have been planned and would be "opportunistic", did not specify the charges to which he will be the subject.
The disappearance of Cleo Smith had aroused immense excitement and a surge of solidarity in Australia.
The announcement of his "safe and sound" discovery, in a locked house near Carnarvon, sparked the joy of many Australians who feared a tragic outcome.
"Our family is complete again," said her mother, Ellie Smith, in a message accompanying a photo of her daughter posted on Instagram.
The girl seems to be doing well
The home of the girl's family, which is also in the small town of Carnarvon, a few kilometers from the house where she was found, was immediately decorated by the locals with balloons and welcome signs.
One of the officers who tracked down the girl, Cameron Blaine, said Cleo, whom he visited upon leaving the hospital where she underwent medical examinations, appears to be doing well.
Cleo's mother woke up at 6 a.m. on October 16 to find that the family tent was open and her eldest daughter was missing, which sparked a major search by land, air and sea, mobilizing around 100 people. police officers.
