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Article
Objective Analysis of Impressed Chisel Toolmarks
Journal of Forensic Sciences
  • Ryan Spotts, Iowa State University
  • L. Scott Chumbley, Iowa State University
Document Type
Article
Publication Version
Submitted Manuscript
Publication Date
1-1-2015
DOI
10.1111/1556-4029.12863
Abstract
Historical and recent challenges to the practice of comparative forensic examination have created a driving force for the formation of objective methods for toolmark identification. In this study, fifty sequentially manufactured chisels were used to create impression toolmarks in lead (500 toolmarks total). An algorithm previously used to statistically separate known matching and nonmatching striated screwdriver marks and quasi-striated plier marks was used to evaluate the chisel marks. Impression toolmarks, a more complex form of toolmark, pose a more difficult test for the algorithm that was originally designed for striated toolmarks. Results show in this instance that the algorithm can separate matching and nonmatching impression marks, providing further validation of the assumption that toolmarks are identifiably unique.
Comments

This is a manuscript of an article published as Spotts, Ryan, and L. Scott Chumbley. "Objective analysis of impressed chisel toolmarks." Journal of forensic sciences 60, no. 6 (2015): 1436-1440, doi:10.1111/1556-4029.12863. Posted with permission.

Copyright Owner
American Academy of Forensic Sciences
Language
en
File Format
application/pdf
Citation Information
Ryan Spotts and L. Scott Chumbley. "Objective Analysis of Impressed Chisel Toolmarks" Journal of Forensic Sciences Vol. 60 (2015) p. 1436 - 1440
Available at: http://works.bepress.com/l_chumbley/48/