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A compelling journey into the science and behavior of psychopaths, written by the leading scientist in the field of criminal psychopathy.We know of psychopaths from chilling headlines and stories in the news and movies - from Ted Bundy and John Wayne Gacy, to Hannibal Lecter and Dexter Morgan. As Dr. Kent Kiehl shows, psychopaths can be identified by a checklist of symptoms that includes pathological lying; lack of empathy, guilt, and remorse; grandiose sense of self-worth; manipulation; and failure to accept one's actions. But why do psychopaths behave the way they do Is it the result of their environment - how they were raised - or is there a genetic component to their lack of conscience This is the question Kiehl, a protg of famed psychopath researcher Dr.