Primetime Live: The Outsiders: Genetic Sexual Attraction/School of Shock/Zodiac

First, a phenomenon called Genetic Sexual Attraction where family members who did not grow up together become attracted to each other when they meet. Then, a school for children where they use a controversial shock therapy to help their patients. Finally, a look at the true unsolved case behind the new movie "Zodiac." Forty years later, a recent investigation that led to the discovery of new evidence.