InTheHeatofLisbon 
My person was born into chaos and dysfunction, and because of the interests of others to hide it, she actually never really stood a chance. But that isn't how the police see her.They see her as chaotic, criminal, a failure, their "client base."
She was first failed by all her family, some of whom where horribly young and compounded things by making the mistake of asking for help at a time when underage mum's where seen as 'teenage Lolita's' and much older husbands where 'lucky bastards'.
She (and those who asked for help escaping) where then horribly failed by social services.
Instead of helping those trying to get away, took her away for disclosing he'd abused her, wouldn't protect her siblings from him, then locked her up for kicking off and running away from care, then dumped her back, badly damaged, after she'd developed a serious drug addiction in their care.
Maybe, miracles did happen for her, and she suddenly went from serious addict self funding by selling herself, to clean and serene. The police favor that along with 'maybe a rich client rescued her.'
We find both highly unlikely and she'd have also needed a personality transplant to stay entirely away from her much loved siblings, and never show anyone what she'd achieved. No one who knew her believes it.
Her estranged father took money for supposed info, and tormented her mother with grim stories, but it came to nothing. Then he died, and her possessions with her name on turned up at an auction house placed for sale by a local child care worker. Auction was stopped. Police weren't interested because seller said I could have her things, free.
He claimed to have got them from an 'unadvertised house contents sale' that he'd 'randomly come across' then claimed he couldn't remember where it was. Police continued to have no interest, including when more of her things emerged elsewhere. They told me not to pay for them or for info, but wouldn't investigate.
She matters, she will always matter. We as her family accept the judgement rained on us for who we are and our failings. We don't want sympathy, we think she's probably dead, but want to be certain she isn't held somewhere and suffering, and if there is anything left we could do for her, we would, including not trying to find her.
As long as we are alive she will matter and we will keep searching unless we believe she didn't want us to.