John Douglas – Crime Classification Manual: A Standard System for Investigating and Classifying Violent Crimes

„A very useful guide for any professional involved in the investigation or litigation of major felonies. Classification of the elements of crime will facilitate the conduct of criminal investigations and resolution of cases.” (Richard L. Goldberg, M.D., Georgetown University Hospital)

„The very first book by and for criminal justice professionals in the major case fields . . . . The skills, techniques, and proactive approaches offered are creatively concrete and worthy of replication across the country. . . Heartily recommanded for those working in the 'front line’ of major case investigation.” (John B. Rabun, Jr., ACSW, vice president and chief operating officer, National Center for Missing and Exploited Children)