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Citation |
Shaw KP, Chung JH, Chung FC, Tseng BY, Pan CH, Yang KT, Yang CP. J. Forensic Sci. 2011; 56(4): 967-971. |
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Affiliation |
Department of Forensic Pathology, Institute of Forensic Medicine, Ministry of Justice, Taipei, Taiwan. |
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Copyright |
(Copyright © 2011, American Society for Testing and Materials, Publisher John Wiley and Sons) |
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DOI |
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PMID |
21480893 |
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Abstract |
The characteristics of knife tool marks retained on hard tissues can be used to outline the shape and angle of a knife. The purpose of this study was to describe such marks on bone tissues that had been chopped with knives. A chopping stage with a gravity accelerator and a fixed bone platform was designed to reconstruct the chopping action. A digital microscope was also used to measure the knife angle (θ) and retained V-shape tool mark angle (ψ) in a pig skull. The κ value (elasticity coefficient; θ/ψ) was derived and recorded after the knife angle (θ) and the accompanied velocity were compared with the proportional impulsive force of the knife and ψ on the bone. The constant impulsive force revealed a correlation between the V-shape tool mark angle (ψ) and the elasticity coefficient (κ). These results describe the tool marks-crucial in the medicolegal investigation-of a knife on hard tissues. Language: en |