These books explain how crime-scene investigators use science to analyze evidence and thereby solve crimes, providing easy hands-on experiments to help young investigators get started. Biological Clues discusses gathering and examining evidence left by humans and animals. In Crime Scene Basics, readers will become familiar with the tools used by investigators and how to set up a CSI kit, and learn techniques such as mapping the scene and measuring dimensions. Eyewitness Encounters covers interrogations, composite sketches, animal investigative techniques, and observation and memory skills.