Objective Analysis of Impressed Chisel Toolmarks
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Ryan Spotts [1] ; L. Scott Chumbley [1]
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[1] Iowa State University
Iowa State University
Township of Franklin, Estados Unidos
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- Localización: Journal of forensic sciences, ISSN-e 1556-4029, ISSN 0022-1198, Vol. 60, Nº. 6, 2015, págs. 1436-1440
- Idioma: inglés
- Texto completo no disponible (Saber más ...)
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Resumen
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.
