JOHN DOUGLAS... author and former FBI unit chief who originated the Unabomber profile talks about the 18-year manhunt for the Unabomber suspect. Douglas has published a new book, "Unabomber: on the trail of America's most wanted serial killer" (Pocket Books, a division of Simon & Schuster). His previous book is, "Mindhunter", a report on the criminal profiling program of the FBI's behavioral science unit.
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