The detective as advocate for the dead
The investigator's job is recast as a debt owed to the victim, not a service to the state or to public order. Because the dead cannot speak, someone has to insist that their life counted.

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The investigator's job is recast as a debt owed to the victim, not a service to the state or to public order. Because the dead cannot speak, someone has to insist that their life counted.
A bureaucracy sorts victims by social value. The poor, the sick, the addicted, and the sexually exploited get filed as unexplained and are then quietly forgotten. Relegating these cases to a low-status department makes neglect look like routine administration, so the system can abandon people without anyone deciding to.
The victim's first-person record, here Dora's diary, turns her from a corpse into a person whose inner life the investigator must answer to. That intimacy generates the empathy and rage that drive the pursuit. It also exposes the investigator's own grief, because what he is chasing becomes restitution rather than just a solved case.