Andrew Miller, who is also known as Amy George, offered to give the girl a lift home in February of this year.
The 53-year-old instead drove her to his own house, took her into a bedroom and refused to let her leave.
He then subjected her to a series of sexual assaults over the course of the next 27 hours.
The High Court in Edinburgh was told the girl was only able to escape from the bedroom after Miller fell asleep on the second night of her ordeal.
She found his landline, dialled 999 and the police arrived within minutes. Miller – a father of three who lived alone – was still sleeping when he was arrested.
Judge Lord Arthurson told Miller that he had admitted “abhorrent crimes” of the utmost “deviance and depravity” and which were “the realisation of every parent’s worst nightmare”.
The court was told that Miller identifies as transgender and is in the process of transitioning to female. He was not known to his victim before he abducted her.
At the time of his arrest, he was presenting as Amy George but confirmed he wished to be addressed as Andrew Miller using “he” pronouns for simplicity.
The girl later told police she had been unable to get a bus home and so started to walk when she was approached “by a lady in a car” who offered to give her a lift.
She said she had accepted the offer and got into the Jaguar car because she was cold and believed the “lady” to be non-threatening.
Full Story: https://www.bbc.com/news/uk-scotland-65610429