Police inspector assisting Maigret, handles procedural and fieldwork duties.
Lagrume assists Maigret with investigative reporting and procedural work.
Lagrume reports to Maigret that the public is obsessed with the killer and provides information during the investigation.
They belong to the investigative team handling the case.
Lagrume and Torrence are both identified as detectives involved in responding to the Marais murders and the resulting public pressure.
Lagrume contributes to the broader investigation surrounding Marcel and his family.
Lagrume reports on public obsession with the killer while detectives question residents and investigate the Maurin household.
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