Lawyers for Amanda and Raffaele screwed up by not attending the DNA analysis. They were invited, but did not attend. Big mistake on their parts. During the trial, Raffaele's lawyer asked to have the DNA tests evaluated. That was refused, but it was known at that time that it was a major point for appeal. During the appeal, as was expected, it was decided that some of the DNA analysis would be evaluated. This is not to say that the DNA will be re-evaluated, only the testing will be re-evaluated. The judge also said that in the event there is no more DNA to test, only the test methods will be assessed. That's where we are today.
This decision was made because the defense alleged that there was contamination. All that is happening now is an evaluation of the tests to confirm that they were done properly and to exclude the possibility of contamination. It has never been doubted that the DNA from the knife belonged to Meredith, or that the DNA on the handle belonged to Amanda. The only question is whether the tests were done correctly, and whether the DNA really came from, for example, the knife and the handle.
As I mentioned earlier, no one connected with the trial is alleging that there never was any DNA to test ... that's coming from people that want to imply that there was some sort of conspiracy between the prosecutor and all the investigators to falsify evidence. There was DNA to test and those tests are on record. Those tests are being evaluated due to a request made by the defense.