Every contact leaves a trace: a single strand of hair or a tiny droplet of blood can be the silent witness at a crime scene. Locard's Exchange Principle underpins all forensic science and holds that the perpetrator of a crime will bring something to the crime scene and leave with something from it. Forensic experts use this principle daily to catch murderers and assailants. In Risking Life for Death, South African forensic pathologist Ryan Blumenthal offers a master class in this singular ...