Most people know Amber Alerts as child-abduction emergency notifications that help law enforcement find missing kids. But the tragic abduction and murder case behind the notorious alert system was never solved—and police are still looking for clues.
What is evil—and how do we measure it? Is it more evil to abduct and torture a stranger for days before ultimately letting them go, or to fatally shoot a spouse in a fit of jealous rage? We speak to clinical psychologist Dr. Gary Bucato, co-author of the new book, 'The New Evil,' about how he determined what acts are more evil than others and why serial killers aren't all categorized the same way.