3 ideas
A girl's disappearance becomes an investigable case only when someone with social standing reports it and keeps pressing. Poor, undocumented, or unclaimed girls go missing without triggering any institutional response, so their exploitation leaves no official trace. Predators exploit this gap by choosing victims whose absence nobody will register.
Read abuse of girls as something enabled by respectable settings such as affluent homes, cultured institutions, and trusted mentors, not only by visibly dangerous neighbourhoods. The mechanism is control over a child's isolation and secrecy: an abuser who holds status and access can operate in plain sight because suspicion is directed at the poor and marginal instead.
A journalist can move documented violence into genre fiction to reach readers who would not absorb it as news or statistics. Following a single investigator through a plot turns aggregate harm into a traceable chain of specific acts, places, and complicities.