This updated and expanded edition presents a comprehensive approach to the processing of an underwater crime scene and the steps necessary to conduct the operation. It summarizes history, physics, and laws applicable to underwater investigations and includes topics such as team formation, roles, deployment, and accountability. Explaining procedures that can make a true difference in the final outcome of water-related incidents, the authors also debunk myths associated with submerged evidence. This second edition presents an expansion of previous content as well as several new chapters on photography, contaminated sites, preservation of evidence, and releasing the crime scene.