Discovery of unserved warrant renews family's call for justice for Emmett Till

The family of Emmett Till is calling for justice. Nearly 70 years ago, the Black 14-year-old's murder helped spur the civil rights movement in America. His family recently discovered an unserved arrest warrant for his accuser, who is still alive today. They hope it can lead to her arrest. CNN's Sara Sidner has more.

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