Lecoq is a detective police agent

Emile Gaboriau (1832–1873) is one of the founders of the detective genre, whose works became the basis for many subsequent authors. His very first novel, The Lerouge Affair (1866), caused a great stir by introducing the public to a new type of hero – a clever, insightful detective, in whom society saw a kind of "guardian angel". This is exactly the character that became his famous police inspector...