Sharp Force Injuries. The wound found during the autopsy (a) and the one inflicted with the knife seized as material evidence (b). In the edges of both wounds there are characteristic scratches looking alike. Striated abrasions from a knife with non-serrated blade--identification of the instrument of crime on the basis of an experiment with material evidence. Kaliszan M, Karnecki K, Akçan R, Jankowski Z - International journal of legal medicine (2011). Not Altered. CC.