A murder has been committed! Visitors, on their own or in teams, become detectives responsible for solving the case. They set out looking for clues, visiting the different sections of the exhibition, from the scene of the crime to the autopsy-room and the archives, and conducting analyses in the ballistic, genetic, biometric, fibre analytic and chromatographic laboratories.

Everywhere they go, the ‘detectives’ listen to testimony, find clues and carry out analyses, to enable them to gather enough information to arrest the criminal. They follow trails and keep track of their findings in a special notebook. When they believe they have solved the mystery, they validate their suspicions – and if they have managed to pin the crime on the right suspect, they get to attend the murderer’s confession!