Frederick S. Calhoun, PhD, oversaw a national workplace violence prevention program for a large federal agency. He earned his PhD from the University of Chicago. He was the lead researcher and principal architect in developing the threat assessment process used by the United States Marshals Service for analyzing risks to federal judicial officials. He also developed the service's policies and procedures for conducting protective investigations and wrote the curriculum and led the training of deputy US Marshals Service threat investigators and their supervisors. He is the author of 12 books and teaches a periodic two-day seminar, "Managing Threats: Reducing the Risk of Violence," designed to train law enforcement officers, mental health professionals, and private security officials to identify, assess, and manage individuals of violent intent.

Stephen W. Weston, JD, is a retired 32-year veteran of the California Highway Patrol. For 15 years, he managed the unit responsible for investigating threats against California state officials and government facilities. He is the coauthor of four books with Frederick S. Calhoun, consults with government and private organizations in the management of threatening situations, and lectures throughout the United States on threat management topics. He has served as president of the Northern California Chapter of the Association of Threat Assessment Professionals and taught a class in the California State University system entitled "Violence and Terrorism."

THREAT ASSESSMENT AND MANAGEMENT STRATEGIES. Establishing Threat Management Processes. Identifying Problem Individuals. Assessing Problem Individuals. Managing Problem Individuals. IDENTIFYING THE HOWLERS AND HUNTERS. Introducing Hunters versus Howlers. Defining Hunters and Howlers. Understanding Hunters. Understanding Howlers. Working with the Intimacy Effect and the Law. Working with the Hunter, Howler, and Other Concepts. Appendix.