Who is the killer in maigret sets a trap?

In "Maigret Sets a Trap" by Georges Simenon, the killer is revealed to be a man named Georges Simenon. The story revolves around a series of murders in Brussels, and Inspector Maigret meticulously investigates the case, ultimately uncovering the perpetrator through a combination of psychological insight and keen observation. The resolution highlights Maigret's methodical approach to solving crimes and understanding human behavior.