Campus Units

Materials Science and Engineering, Ames Laboratory

Document Type

Article

Publication Version

Accepted Manuscript

Publication Date

1-2017

Journal or Book Title

Journal of Forensic Sciences

Volume

62

Issue

1

First Page

83

Last Page

91

DOI

10.1111/1556-4029.13233

Abstract

Since the development of the striagraph, various attempts have been made to enhance forensic investigation through the use of measuring and imaging equipment. This study describes the development of a prototype system employing an easy‐to‐use software interface designed to provide forensic examiners with the ability to measure topography of a toolmarked surface and then conduct various comparisons using a statistical algorithm. Acquisition of the data is carried out using a portable 3D optical profilometer, and comparison of the resulting data files is made using software named “MANTIS” (Mark and Tool Inspection Suite). The system has been tested on laboratory‐produced markings that include fully striated marks (e.g., screwdriver markings), quasistriated markings produced by shear‐cut pliers, impression marks left by chisels, rifling marks on bullets, and cut marks produced by knives. Using the system, an examiner has the potential to (i) visually compare two toolmarked surfaces in a manner similar to a comparison microscope and (ii) use the quantitative information embedded within the acquired data to obtain an objective statistical comparison of the data files. This study shows that, based on the results from laboratory samples, the system has great potential for aiding examiners in conducting comparisons of toolmarks.

Comments

This is the peer-reviewed version of the following article: Chumbley, Scott, Song Zhang, Max Morris, Ryan Spotts, and Chad Macziewski. "Development of a mobile toolmark characterization/comparison system." Journal of Forensic Sciences 62, no. 1 (2017): 83-91, which has been published in final form at DOI: 10.1111/1556-4029.13233. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving. Posted with permission.

Copyright Owner

American Academy of Forensic Sciences

Language

en

File Format

application/pdf

Published Version

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