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An Investigation of Test Impression Methods ]to Accurately Reproduce Randomly Acquired Characteristics in Footwear Outsoles

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dc.contributor.author Whitlow, Lindsy
dc.date.accessioned 2017-09-11T18:33:12Z
dc.date.available 2017-09-11T18:33:12Z
dc.date.created July 2017 en_US
dc.date.issued 2017-09-11
dc.identifier.uri http://hdl.handle.net/123456789/3573
dc.description.abstract The Scientific Working Group for Shoeprint and Tire Tread Evidence has published standards for making test impressions of footwear and tires using various methods; however, there is little published research on documenting randomly acquired characteristics (RACs) and studies comparing methods of documenting RACs. The purpose of this research was to calculate the statistical accuracy of various test impression methods of capturing randomly acquired characteristics, (such as nicks, scuffs, and cuts). This research focused on making 2D impressions of worn work boots, and sneakers with two methods: (1) the Identicator® inkless shoe print system, and (2) Handiprint® lifting material with black fingerprinting powder. For both methods, three different mechanisms were tested: (1) Dynamic step, (2) Static step, and (3) Rolled. This project was conducted in three phases. The first consisted of documenting the shoes and making the test impressions. The second phase included documenting the RACs that were reproduced on the impressions and identifying randomly acquired characteristics on the outsole of the shoes. The third, and final phase, was comprised of the statistical analysis and interpretation of the results. The statistical analyses concluded that the two techniques with the highest percentage of RACs transferred, Technique 1- Identicator® Dynamic step, and Technique 6- Handiprint® Rolled were statistically similar. The analyses also determined that Static step impressions resulted in a substantial reduction in capture efficacy. Overall, it was shown that the mechanism used to make an impression was of greater influence than the method used. en_US
dc.language.iso en_US en_US
dc.title An Investigation of Test Impression Methods ]to Accurately Reproduce Randomly Acquired Characteristics in Footwear Outsoles en_US
dc.type Thesis en_US
dc.college las en_US
dc.academic.area Forensics en_US
dc.advisor Dr. Melissa Bailey en_US
dc.department biological sciences en_US

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