When tackling a crime, the investigator's only solution is to make the clues talk! There is no such thing as a perfect crime. Assault, kidnapping, murder... the culprit always leaves traces behind him.
On July 19th 2004, the naked and tied up body of a woman is recovered in the Ourcq canal in Fresnes-sur-Marne. The victim is impossible to identify.
S4E1 57 min