Stevenson: U.S. prison system is hurting society

With over 2 million Americans in prison, and 6 million on probation and parole, Bryan Stevenson, founder of the Equal Justice Initiative, speaks to Yahoo Global News Anchor Katie Couric about the state of criminal justice reform and over-incarceration in America. Stevenson , author of the best-seller "Just Mercy," is a member of The Marshall Project's advisory board and tells Couric: "We're all more than the worst thing we've ever done."