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                            Library & Multimedia
 Smokeless Powder Reference Collection and SWGFEX Smokeless Powders Database Expansion
NCJ Number
              250933

Author(s)
          Michael E. Sigman Ph.D.;
                        Mary  Williams M.S.;
                        Dana-Marie K. Dennis Ph.D.
Date Published

July 2017
Length
              71 pages
Annotation
              This research project expanded the National Center for Forensic Science (NCFS) Smokeless Powders Database, addressed the need for reference materials, and used the Smokeless Powders Database to provide a statistical assessment of the value of a match between a database record and the physical and chemical properties of a questioned sample in a database query.
Abstract
              In 1998, the National Research Council (NRC) issued a report, "Black and Smokeless Powders Technologies for Finding Bombs and the Bomb Makers." This report recommended the development of a comprehensive national powder database that will contain information about the physical characteristics and chemical composition of commercially available black and smokeless powders;  however, it was not until 2009 that the NCFS collaborated with the Scientific Working Group for Fire and Explosions (SWGFEX) to begin work on an internet-accessible database of analytical information on smokeless powders.  The database opened in early 2011 with 100 entries of legacy powders provided by Mr. Ronald Kelly.  The current project described in this report expanded the NCFS Smokeless Powders Database to contain over 800 records that cover both legacy and newly purchased smokeless powders.  The result is that the database can serve as a resource for local, State, and Federal law enforcement investigations.  The project addressed the need for reference materials by providing a set of 100 smokeless powder samples to each of 50 ASCLD/LAB accredited laboratories.  Forty-two of the 50 labs accepted the samples.  Regarding a statistical assessment of the value of a match between a database record and a questioned sample in a query,  an upper limit is provided for the evidentiary or investigative value of a query-match.  Methodology is described for the project.  8 tables, 5 figures, 64 references, and appended smokeless powders analysis method for years 2010 and 2014
      
  
          Additional Details
Grant Number(s)
        2013-R2-CX-K008


  
  
        
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        NIJ-Sponsored


  
  
        
  Publication Type
        Research (Applied/Empirical)
                                Report (Technical Assistance)
                                Report (Study/Research)
                                Report (Grant Sponsored)
                                Program/Project Description
                                Grants and Funding


  
  
        
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        Smokeless Powder Reference Collection and SWGFEX Smokeless Powders Database Expansion
    
  
  
Date Published: July 1, 2017
    
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