After two days working in the water, students spend a night analyzing their data for presentation in mock court. They review videos and compile measurements, plotting them on maps, and compare all the evidence against the witness's testimony. "They put together a great presentation," Zinszer says afterward. "They laid their evidence out in a systematic, methodical way just like they should." And then "the attorneys ate them up and spit them out"--exactly as planned. Learning to stand up to tough questioning is a key part of the process, Zinszer explains. The dive teams had not combed the reef site thoroughly enough and had missed a key piece of evidence: a regulator that had become detached from the victim. And because they started with a report of exactly where to find the body, they had neglected to make a sonar map of the reef, which they could have used to back up physical measurements of the body's location. Next time, in the real world, the diver-investigators will be more prepared, Zinszer says: "They just need to get beat up in court a few times to learn how to put everything together."