Any crime leaves traces. The task of the criminologist is to find and solve them, and for this, the arsenal of professionals has tools and techniques that help bring even the most cunning, cruel and resourceful criminals to clean water. You are waiting for a step-by-step study of 50 "ideal" crimes, widely covered in the world press and solved solely thanks to the experience, skill and talent of forensic experts. You'll learn fascinating details about fingerprints, tool impressions and footprints of all kinds, DNA, blood spatter, ballistics, poisons and drugs, as well as handwriting and voice analysis. Each chapter discusses the different types of evidence and the methods used to discover evidence analysis. The authors of the book tell how a typical working day of employees of the forensic department develops. The book "Himself or Helped" is not just an introduction to forensic science: it reads like an exciting detective story, and numerous documentary illustrations contribute to a brighter and more complete perception of information.