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                            Library & Multimedia
 Statistical Confirmation of Empirical Observations Concerning Tool Mark Striae
NCJ Number
              304341
Journal

*AFTE Journal* Volume: 39 Dated: 2007
Author(s)
          L. Genalo;
                        et al
Date Published

2007
Annotation
              In performing the statistical confirmation of empirical observations of tool mark striae, this project focused on toolmarks produced by 44 sequentially manufactured screwdriver tips characterized for surface roughness using a profilometer.
Abstract
              Toolmarks were produced in lead at angles of 30°, 60°, and 85°. A computer program developed to compare and match the profilometer data has been used to show that marks from a single tip produced at similar angles yield much higher correlation values than marks produced from the same tip but at different angles. This analysis provides statistical support for the widely-accepted empirical observation that toolmark striae must be reproduced at similar angles in order to be unambiguously identified as being made by a particular tool. (Publisher Abstract)
      
  
          Additional Details
Grant Number(s)
        2004-IJ-R-088


  
  
        
  Agencies
        NIJ-Sponsored


  
  
        
  Publication Type
        Research (Applied/Empirical)


  
  
        
  Award
        Quantification of Tool Markings
    
  
  
Date Published: January 1, 2007
    
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                Forensic sciences
        Evidence analysis and processing
        Toolmark identification
        Comparative Analysis
        Statistical methodologies



  
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