Who would do something like this? -- Kunlangeta, psychopaths, and sociopaths: does the label matter? -- What does brain imaging see? -- A problem just behind the forehead -- Troubling developments and genes -- Back again? Predicting bad behavior -- Missing fear and empathy -- Successful, unsuccessful, and other types of psychopaths -- Could you become a psychopath? -- Could your child be a budding psychopath? -- Why do we have to deal with these people? Explaining criminal psychopaths to juries and Darwinists.