Welcome to the exciting world of forensic science, where every contact leaves a trace! This book shows how real-life detectives solve crimes with human signposts: fingerprints, the most well-known human indentifying mark; as well as newer technologies, like bite mark matching; and controversial new evidence, such as ear prints. Prepare yourself for a wild ride through some of the most shocking and mysterious crimes of history, the twentieth century, and today...you may never look at your fingertips the same way again!