3 ideas
Read the countryside's intimacy, tradition and self-sufficiency as the machinery of control, not as a refuge from modern harm. Those conditions let male power over women go unchallenged, so the same features that look like community are what make abuse invisible and hard to escape.
In a closed community, violence against women gets reclassified as accident, suicide, or family business. Naming it a crime would indict the social order the whole group depends on. The silence is therefore not a failure of knowledge but active complicity: people know enough to protect the arrangement and refuse to know enough to break it.
A female detective from outside the community can see what insiders cannot, because she owes nothing to its hierarchy and is herself a target of its assumptions. Her investigation shifts from finding an individual culprit to exposing a system: the question becomes not only who killed, but what arrangement made the killing ordinary. This recasts the detective genre so that the solution indicts a social order rather than restoring it.