JOHN E. DOUGLAS has been an FBI agent for over thirty years. One of the most successful and best-known true crime authors in the country, his many books include the New York Times bestseller Mind Hunter, which first introduced the public to the idea of psychological profiles as a tool in hunting down killers.ANN W. BURGESS, RN, DNSc, is the author of nine textbooks on psychiatric nursing and crisis intervention and ten books on assessment and treatment of child, adolescent, and adult sexual assault victims and serial offenders.ALLEN G. BURGESS is a former associate professor in the College of Business Administration at Northeastern University in Boston.ROBERT K. RESSLER, MS, is a twenty-year veteran of the FBI. He developed many of the programs that led to the formulation of the FBI's National Center for the Analysis of Violent Crime.

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• Preface viiPART I CRIME ANALYSIS AND INVESTIGATION1 Crime Classification: Past and Present 32 Criminal Investigative Concepts in Crime Scene Analysis 21John E. Douglas and Lauren K. Douglas3 The Impact of the Internet, Technology, and Forensics on Crime Investigation 39John E. Douglas, Lauren K. Douglas, and Stefan R. Treffers4 Local, Federal, and International Agencies 595 Classifying Crimes by Severity From Aggravators to Depravity 91Michael WelnerPART II THE CLASSIFICATIONS6 Criminal Enterprise Homicide 1117 Personal Cause Homicide 1658 Sexual Homicide 2059 Extremist and Medical Homicide 23710 Group Cause Homicide 26311 Arson/Bombing 27712 Rape and Sexual Assault 30713 Nonlethal Crimes 36714 Computer Crimes 399Allen G. Burgess15 Increased Globalization of Crime 431Stefan R. Treffers16 Mass and Serial Homicide 47117 Poison and Biological Agents as Weapons 491Arthur E. Westveer, John P. Jarvis, Carl J. Jensen, III, and Anne M. BergerPART III LEGAL ISSUES18 Interviewing, Interrogation, and Criminal Confessions 507Gregory M. Cooper, Michael P. Napier, and Susan H. Adams19 Wrongful Convictions: Causes, Solutions, and Case Studies 527Peter ShellemAbout the Editors 545About the Contributors 549Citation Index 551Name Index 555Subject Index 557We dedicate this edition to chapter contributors Peter Shellem, B. S. (1960–2009) award-wining crime investigative reporter in Pittsburgh, PA and Arthur E. Westveer, M.L.A. (1936–2010) retired FBI supervisory special agent

JOHN E. DOUGLAS has been an FBI agent for over thirty years. One of the most successful and best-known true crime authors in the country, his many books include the New York Times bestseller Mind Hunter, which first introduced the public to the idea of psychological profiles as a tool in hunting down killers.ANN W. BURGESS, RN, DNSc, is the author of nine textbooks on psychiatric nursing and crisis intervention and ten books on assessment and treatment of child, adolescent, and adult sexual assault victims and serial offenders.ALLEN G. BURGESS is a former associate professor in the College of Business Administration at Northeastern University in Boston.ROBERT K. RESSLER, MS, is a twenty-year veteran of the FBI. He developed many of the programs that led to the formulation of the FBI's National Center for the Analysis of Violent Crime.

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• Preface viiPART I CRIME ANALYSIS AND INVESTIGATION1 Crime Classification: Past and Present 32 Criminal Investigative Concepts in Crime Scene Analysis 21John E. Douglas and Lauren K. Douglas3 The Impact of the Internet, Technology, and Forensics on Crime Investigation 39John E. Douglas, Lauren K. Douglas, and Stefan R. Treffers4 Local, Federal, and International Agencies 595 Classifying Crimes by Severity From Aggravators to Depravity 91Michael WelnerPART II THE CLASSIFICATIONS6 Criminal Enterprise Homicide 1117 Personal Cause Homicide 1658 Sexual Homicide 2059 Extremist and Medical Homicide 23710 Group Cause Homicide 26311 Arson/Bombing 27712 Rape and Sexual Assault 30713 Nonlethal Crimes 36714 Computer Crimes 399Allen G. Burgess15 Increased Globalization of Crime 431Stefan R. Treffers16 Mass and Serial Homicide 47117 Poison and Biological Agents as Weapons 491Arthur E. Westveer, John P. Jarvis, Carl J. Jensen, III, and Anne M. BergerPART III LEGAL ISSUES18 Interviewing, Interrogation, and Criminal Confessions 507Gregory M. Cooper, Michael P. Napier, and Susan H. Adams19 Wrongful Convictions: Causes, Solutions, and Case Studies 527Peter ShellemAbout the Editors 545About the Contributors 549Citation Index 551Name Index 555Subject Index 557We dedicate this edition to chapter contributors Peter Shellem, B. S. (1960–2009) award-wining crime investigative reporter in Pittsburgh, PA and Arthur E. Westveer, M.L.A. (1936–2010) retired FBI supervisory special agent