On a cold dark day in December of 1972, a commercial airliner slammed into a suburb of Chicago, killing 45 people. One of the victims was a woman named Dorothy Hunt. In her purse, investigators discovered $10,000 in cash. Her sudden death sparked a firestorm. Dorothy, as it happened, was at the center of a rapidly unfolding scandal consuming the nation. Questions swirled over the true nature of the disaster: Was the crash an accident? Or an act of sabotage? Eric Shawn investigates.