Shannon Matthews, the nine-year-old girl who dramatically reappeared after being missing for 24 days, has been questioned by specially-trained officers.
The officers are trying to find out what happened since she went missing on February 19.
Shannon had a "comfortable and settled night", police said. She has spent time watching films and playing with a kitten after being rescued by police from a flat less than a mile from her family home in Dewsbury, West Yorkshire, on Friday.
Shannon has now been made the subject of an Emergency Police Protection Order.
A West Yorkshire Police spokesman said: "Shannon Matthews has been away from home for almost four weeks. As part of our ongoing inquiries, and following medical checks, West Yorkshire Police will begin the process of interviewing Shannon.
"This may be a long process but throughout this inquiry our main focus has been and continues to be Shannon's welfare.
"We have therefore taken the decision that, for now, it is in Shannon's best interests that she be made subject of an Emergency Police Protection Order.
"This will remain in place until we have had time to establish the full facts of what happened in the time since her disappearance."
Police arrested 39-year-old Mick Donovan on suspicion of Shannon's abduction at the flat in Lidgate Gardens, in the Batley Carr area of Dewsbury. He is understood to be the uncle of the schoolgirl's stepfather Craig Meehan.
West Yorkshire Police reportedly went to the flat where the "timid" schoolgirl was found after receiving tip-offs from a neighbour and the charity Missing People. Neighbours said Mr Donovan had lived in the flat for three or four years and "kept himself to himself".
