A serial fantasist's lies that she was groomed by an Asian gang are set out in 50 hours of police videos.
The footage, shared exclusively with the BBC, tracks Eleanor Williams' deceit as it becomes more elaborate over a three-year period.
One video shows her with self-inflicted facial wounds while acting drugged.
Williams, 23, from Barrow-in-Furness, Cumbria, was jailed for eight-and-a-half years after being found guilty of perverting the course of justice.
False allegations of rape are extremely rare, but when they are made they can seriously undermine the credibility of genuine victims, according to the Crown Prosecution Service.
Warning: this story contains details that some people may find upsetting
Eleanor Williams went viral in May 2020 when she posted photographs of her bruised face and body on social media and claimed she had been beaten and raped by a gang of Asian men.
However, an hour after her Facebook post went live, it was the then-19-year-old Williams who was arrested.
A surge in hate crime followed in her hometown of Barrow-in-Furness - Cumbria Constabulary recorded 83 linked to the post, with residents within the Asian community receiving death threats and being verbally abused and spat at. Some businesses were also vandalised.
At that stage, the police were unable to tell the public what they already knew about Williams for fear of prejudicing a future trial.
But now a BBC Three documentary has exclusively revealed footage from the case that shows the scale of her deception.
Williams is 16 years old when, in 2017, she accuses her first male victim of rape.
During the police interview that follows, she is filmed wearing a brightly coloured T-shirt with cartoons on it.
Speaking publicly for the first time about the case, Det Con Claire Ritchie recalls: "She looked really young."
The detective - who specialises in interviewing victims of sexual offences - says: "The majority of people would never lie about something like this so there's no reason not to believe somebody, but it's my job to establish the facts."
The man Williams accuses denies all knowledge and she then withdraws her involvement in the investigation.
Eighteen months later, the teenager lodges a fresh set of false sexual allegations against her second victim, who spends 10 weeks in prison before being released.
In a police interview around that time, Williams' hair is tied back so that bruising on her cheek is visible.
Williams, then 18, speaks quietly and says of the man she is accusing: "He had a knife and was waving it around… [He] pulled me into the bathroom by my hair, stripped me naked and was hitting me with the shower head."
Weeks after this, Williams makes an even more serious claim - that an Asian grooming gang is forcing her to have sex with men across the north-west of England.
Detectives believe she had researched previous grooming scandals involving young white female victims and Asian male perpetrators.
"What I can clearly see is an evolution," says Det Con John Robinson. "You've got an awful allegation in 2017, a much worse allegation in 2019 and weeks later it properly snowballs into a massive organised crime group."