I just have to say something here, it is highly unlikely if not impossible for the child to have been spirited out of the country to the UK. Not even for 10 thousand dollars.
The UK is not a third world country, has very tough immigration laws and is surrounded by water, it is almost impossible to smuggle anything in, certainly NOT a child.
The only borders she could have crossed are north and south, Canada and Mexico but then one wonders why.
Her hearing aids were left behind because she didn't need them anymore, her leg is gone because they would have us believe she walked away or was abducted. In the first case she would take her hearing aids with her, in the second an abductor wouldn't stop for the leg or the hearing aids. I am 98% sure her parents are responsible for her being missing.
The 2% of doubt is because maybe her parents were so punitive towards her, just maybe they removed her hearing aids as a punishment and she may have finally snapped and run away, who could blame her. Maybe she put her trust in a stranger and it was totally misplaced....but I guess the attempt at cover up tells the whole story. My heart aches for her, what a truly sad life.