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                            Library & Multimedia
 Quantitative assessment of the discrimination potential of class and randomly acquired characteristics for crime scene quality shoeprints
NCJ Number
              306214

Author(s)
          Nicole Richetelli
Date Published

2015
Length
              148 pages
Annotation
              This research looked to validate the use of footwear impressions as a source of forensic evidence.
Abstract
              The objectives of this study were to: 1) simplify footwear impression data acquisition; 2) establish the baseline performance of an automated footwear classification algorithm; and 3) mathematically evaluate the frequency and similarity of randomly acquired characteristics (RACs) in high quality examples versus crime-scene-like impressions as a function of RAC shape, perimeter, and area. Results show that the unpredictable nature of crime scene print deposition causes RAC loss that varies from 33-100% with an average loss of 85%, and that up to 10% of the crime scene impressions fully lacked any identifiable RACs. Despite the loss of features present in the crime-scene-like impressions, there was a 0.74 probability that the actual shoe's high quality RAC map would rank higher in an ordered list than a known non-match map when queried with the crime-scene-like print. Moreover, this was true despite the fact that 64% of the crime-scene-like impressions exhibit 10 or fewer RACs.
      
  
          Additional Details
Grant Number(s)
        2013-DN-BX-K043


  
  
        
  Agencies
        NIJ-Sponsored


  
  
        
  Publication Type
        Thesis/Dissertation


  
  
        
  Award
        A Quantitative Assessment of Shoeprint Accidental Patterns with Implications Regarding Similarity, Frequency and Chance Association of Features
    
  
  
Date Published: January 1, 2015
    
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      PatentsRelated Topics
        
                Forensic sciences
        Shoe prints and tire tracks
        Research and Development in Forensic Science for Criminal Justice Purposes
        Criminal investigation
        Crime Scene



  
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