Building on their previous work, "K9 Fraud," internationally recognized dog handlers Resi Gerritsen and Ruud Haak?present?common K9 invesitgation errors?and provide tips on how to make sure your work holds up in court. To illustrate the?many ways?incorrect techniques?can derail investigations, the authors examine a number of case studies from around the world, including the 2001 anthrax attacks in the United States and the Scott Peterson case. Gerritsen and Haak also share ways to minimize?errors by emphasizing proper training methods, a rigorous scientific understanding of dogs, and a strong bond between handler and dog.