My understanding of the original scene is that the police first on the scene were not very good, so even if the DNA on the knife is hers, one has to think about

My understanding of the original scene is that the police first on the scene were not very good, so even if the DNA on the knife is hers, one has to think about contamination by the original (postal) police. http://en.wikipedia.org/wiki/Murder_of_Meredith_Kercher#Discovery_of_the_body http://en.wikipedia.org/wiki/Murder_of_Meredith_Kercher#Disc...