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      Reliability and Analysis of Changes in Bite Marks at Different Time Intervals and Temperature Ranges

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          Abstract

          Objectives: The purpose of this study is to assess time-dependent changes in the morphology of bitemarks and to investigate the utility of matching bitemarks on both perishable and non-perishable objects with the passage of time at different temperatures. Subjects and Methods: The study was conducted at Maharana Pratap College of Dentistry and Research Centre, Gwalior, India. 20 volunteers were asked to bite 6 items each. These included perishable and nonperishable items. Perishable items were apple, banana and Burfi, (a milk-based popular sweet confectionary) while non-perishable items included wax, clay, and rubber. Photographs were taken with a digital camera at 0-hours and 24-hours after biting these objects at temperature ranges of 24 ºC to 28 ºC and 36 ºC to 40 ºC, respectively. Life-size photographs of these bitten objects were printed on transparent overlays and compared to hand drawn transparencies prepared from suspect dentition using an X-ray viewer. The comparison of all the 960 transparencies was done by two researchers, independently. Results: All objects gave a positive identification of the biter on matching just after biting. After24-hours, all items also showed positive matching except banana and apples. Conclusion: This proposed method is simple, reliable and less technique sensitive. It narrows down the subjectivity of interpretation. It highlights that due to decomposition changes occur in perishable food items and more so in apples and bananas, making bitemarks less reliable evidence.

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          Author and article information

          Journal
          Arab Journal of Forensic Sciences & Forensic Medicine
          Naif University Publishing House
          01 April 2017
          : 1
          : 5
          Article
          f4da4ee12b904486bed3f26ad261723a
          0ad6f31d-3932-41d1-b499-56ae0877304a

          This work is licensed under Attribution-NonCommercial 4.0 International license. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc/4.0/

          History
          Categories
          Medicine (General)
          R5-920

          Entomology,Pathology,Forensic science,Criminology,Dentistry,Anthropology
          Forensic Science, Bite Marks, Perishable Items and Non-perishable Items, Life Size Photograph, X-ray Viewer

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