When some children found a corpse while playing in the forest, everything pointed to murder. Establishing the precise time of death was crucial. The forensic entomologist Marcus Schwarz was called upon to clarify the question: how long had the body been there? With increasing regularity, the insect researcher has been able to solve spectacular cases. Was it suicide? What do the flies, who are always the first at the crime scene, tell him? Marcus Schwarz made his passion for forensics and criminology his job. This book gives an insight into the practices and the most interesting cases.