CSI Pre-read Chapter 2 1. What happened in the Jon Benet Ramsey case? group answer book answer 2. What is Locard’s Exchange Principle? Book answer Group answer 3. What is the difference between direct and circumstantial evidence? Group answer Book answer 4. Who’s job is it to clean up the crime scene? Group answer Book answer 5. Who is involved in a crime scene investigation? Group answer Book answer