Why did no one flag UNC’s bogus classes?

Aired: 10/23/2014 | 0:10:49 | Clip
For more than 18 years, thousands of students at the University of North Carolina at Chapel Hill took credit courses that never met as a class with a professor; a disproportionate number of the students in those classes were athletes. Gwen Ifill talks to former federal prosecutor Kenneth Wainstein about the investigation that unearthed the fraud and why it lasted so long.