The Importance of Having a Logical Framework for Expert Conclusions in Forensic DNA Proﬁ ling: Illustrations from the Amanda Knox Case
Colin Pitchfork, accused of the murder of two young girls in England in 1986, was the ﬁ rst man ever incriminated by results of modern DNA proﬁ ling analyses. After this ﬁ rst success, the forensic use of DNA spread and was quickly acclaimed as a powerful means to ﬁ ght crime. Soon, however, it became apparent that DNA could also be used for a different purpose: in 1992, Barry Scheck and Peter Neufeld founded the Innocence Project, which relied heavily on DNA to detect wrongful convictions and to analyze their causes. At the time, eyewitnesses and jailhouse informants had long been suspected of unreliability. Surprisingly, though, DNA also exposed scientiﬁ c expertise as a cause of miscarriages of justice, and sometimes even exposed DNA itself as a cause of justice gone wrong.