Jordan, U.S. dispute IS claim of how Kayla Mueller died

Aired: 2/10/2015 | 0:03:14 | Clip
The family of Kayla Jean Mueller confirmed that the 26-year-old aid worker has been killed. Over the weekend, Islamic State militants sent them unspecified evidence of their daughter's death. The Arizona native was working with refugees on the Turkey-Syria border when she was taken captive in 2013. Gwen Ifill reports.