review of the dna evidence. greg palkot, what did the court say? >> reporter: meagan -- megyn, today's activities at the appeals case concerning convicted killer, amanda knox was seen as a plus for her. her conviction was obtained as the prosecution has claimed that american amanda knox's dna was found on the knife used to kill meredith kercher. other dna was found on the bra clapse, claimed to have been, from knox's boyfriend, rafael sollecito. this summer of appeals they have used a battery of experts to knock the validity of that dna evidence down. they used two more today. they have said that it was inadmissible. they said it was contaminated. that's why the prosecution today asked for another test