Stephanie Kercher, sister of murdered British student Meredith Kercher, has condemned Amanda Knox's upcoming solo comedy show "Cartwheel" at the Edinburgh Festival Fringe. Speaking on BBC Breakfast, Kercher directly addressed Knox, asking her to consider the immense pain the Kercher family has endured for nearly two decades. She urged Knox to imagine if the situation were reversed and her own sister had been the victim. The show, which runs for 11 days starting Friday, explores Knox's experience of being convicted and later acquitted of Meredith's 2007 murder in Perugia, Italy, and how she will explain it to her daughter.