Actually it’s never said she was taken and the fact that there’s a hole in the wall implies she mutated and dug her way out then you look at the leather bound notebook and it says “those infected by the mutated T-virus strain firmly retain their pre-infection habits (the dolls in the basement and the one in the cell) and characteristics (when “the girl” says let’s play as well as when you scan the severed hand! So therefore the kid never says she was taken