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Amanda Knox's ex-boyfriend takes the stand in Italy

Amanda Knox's former boyfriend, Raffaele Sollecito, appeared in an Italian courtroom for the retrial over the death of British roommate Meredith Kercher. Knox and Sollecito were convicted in 2009 of murdering Kercher but the conviction was overturned on appeal in 2011, freeing Knox to return to the U.S. where she remains for the latest appeal. Tina Kraus reports from London.