Roger and Penny Scaggs seemed a poster couple for family values. Evangelical Christians living in booming Austin, Texas, in the mid-1990s, they were respected leaders in their church and community. As Roger diligently worked his way up the high-tech corporate ladder, Penny kept a pristine home and coached similarly devout young women on how to be perfect wives. But on a windy March evening, this godly woman met the devil head-on. And when the police...