Au bout de l'enquête, la fin du crime parfait ?

They are all cases that were closed, considered unsolvable, sometimes resisting police efforts for decades until a forgotten clue, an unhoped-for witness or a forensic innovation finally made it possible to unmask the culprit. Alongside Marie Drucker, the criminologist Alain Bauer explains the technical, psychological, sociological or historical elements involved. Presented by: Marie Drucker.