Serial killers like Seattle's Ted Bundy, Maryland's Beltway Sniper, Atlanta's Wayne Williams, or England's Peter Sutcliffe usually outsmart the task forces on their trail for long periods of time. Keppel and Birnes take readers inside the operations of serial killer task forces to learn why. What is the underlying psychology of a serial killer and why this defeats task force investigations? This is the first book of its kind that combines state-of-the-art psychological assessment experience with the expertise of a homicide investigator who has tracked some of this country's most notorious serial killers. The author also brings to the book hands-on best practices gleaned from the experience of other task forces. Readers, both professionals and students, will benefit from the comprehensive and critical case reviews, the analysis of what went wrong, what went right, and the after-action recommendations of evaluators in the US, UK, and Canada. The book covers: * The nature of the psychology of a serial killer * How crime assessment profiling reveals that psychology * Why psychological profiles fail * How serial killer task forces defeat themselves * How the media can, and usually does, undermine the task force operation * The big secret of all serial killer investigations: police already have the killer's name * The best practices for catching a serial killer