1. Introduction -- 2. A brief history of underwater investigation -- 3. An explanation of pressure and the laws of Boyle, Charles, Dalton, and Henry -- 4. The underwater forensic investigator -- 5. The law of search and seizure -- 6. The underwater crime scene -- 7. Underwater photography -- 8. Medicolegal aspects of underwater death -- 9. Firearms recovery and investigation -- 10. Aircraft and vehicle investigations -- 11. Vessel recoveries -- 12. Equipment -- 13. Diving in contaminated water -- 14. Using experts and evidence in the courtroom -- 15. Defense lawyers, prosecutors, and investigators.