The Federal Expert Service (FES) has gathered everything that could assist in investigating the most complex crimes. Not only can the upper echelons of the prosecution turn to them for help, but even a simple operator, equipped with a state-of-the-art laboratory, has each of its staff as a unique expert in their field. Their mission is to assist and guide investigations, examine evidence, and find the most crucial elements that could identify the real criminal. They work every day to ensure that no crime goes unpunished. In 39-minute mini-films, FES employees uncover criminals by investigating complex cases.