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                            Library & Multimedia
 Validation of Tool Mark Analysis of Cut Costal Cartilage, Conference Paper
NCJ Number
              248531

Author(s)
          Jennifer C. Love Ph.D;
                        Sharon M. Derrick Ph.D.;
                        Jason M. Wiersema Ph.D.;
                        Charles  Peters Ph.D.
Date Published

April 2011
Length
              22 pages
Annotation
              This research study was designed to identify and establish potential error rates associated with tool mark analysis of cut marks in costal cartilage.
Abstract
              This research set out to identify and establish potential error rates associated with tool mark analysis of cut marks in costal cartilage. Three knives with different blade types were used to make experimental cut marks in costal cartilage of pigs. Each cut surface was cast and each cast was examined by three analysts working independently and employing the generally accepted method of tool mark analysis of cut marks in costal cartilage. The presence of striations, regularity of striations, and identification of primary and secondary striation patterns were recorded for each cast. The distance between each striation was measured. The results showed that striations were not consistently impressed on the cut surface by the blade's cutting edge, and blade type classification by presence or absence of striations led to a 65% misclassification rate. The use of the classification tree and cross validation methods and inclusion of the mean interstriation distance decreased the error rate to approximately 50%.
      
  
          Additional Details
Grant Number(s)
        2008-NI-CX-0004


  
  
        
  Agencies
        NIJ-Sponsored


  
  
        
  Publication Type
        Research Paper


  
  
        
  Award
        HCME Anthropology Division Metric Research in Forensic Cutmark Interpretation
    
  
  
Date Published: April 1, 2011
    
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