"Outwardly sweet and loving, yet capable of intense deceit ... Ms Papini's chameleonic personalities drove her to simultaneously crave family security and the freedom of youth," defence attorney William Portanova wrote in his responding court filing.
So "in pursuit of a nonsensical fantasy," Portanova said the married mother fled to a former boyfriend in Southern California, nearly 960km south of her home in Redding. He dropped her off along Interstate 5 about 240km from her home after she said she wanted to go home.
Passersby found her with bindings on her body, a swollen nose, a blurred "brand" on her right shoulder, bruises and rashes across her body, ligature marks on her wrists and ankles, and burns on her left forearm. All the injuries were self-inflicted, and all designed to support her story that she had been abducted at gunpoint by two Hispanic women while she was out for a run.
The wounds were a manifestation of her "unsettled masochism" and "self-inflicted penance," Portanova wrote. And once she began, "each lie demanded another lie."
Prosecutors said Papini's ruse harmed more than just herself and her family. "An entire community believed the hoax and lived in fear that Hispanic women were roving the streets to abduct and sell women," they wrote.
Prosecutors agreed to seek a sentence on the low end of the sentencing range in exchange for Papini's guilty plea. That was projected to be between eight and 14 months in custody, down from the maximum 25 years for the two charges.
She has offered no rationale for her actions, which stumped even independent mental health experts who said her actions don't conform with any typical diagnosis.
"Papini's painful early years twisted and froze her in myriad ways," Portantino said in arguing for home confinement. With her deception finally revealed, he said, "It is hard to imagine a more brutal public revelation of a person's broken inner self. At this point, the punishment is already intense and feels like a life sentence."
But prosecutors said her "past trauma and mental health issues alone cannot account for all of her actions."
"Papini's planning of her hoax kidnapping was meticulous and began months in advance – it was not merely the reaction to a traumatic childhood," they wrote.
After her arrest in March, Papini received more than US$30,000 worth of psychiatric care for anxiety, depression and post-traumatic stress disorder. She billed the state's victim compensation fund for the treatment, and now must pay it back as part of her restitution.
As part of the plea agreement, she has agreed to reimburse law enforcement agencies more than US$150,000 for the costs of the search for her and her nonexistent kidnappers, and repay the US$128,000 she received in disability payments since her return.