| The effect of firearm muzzle gases on the backspatter of blood. | |
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MedLine Citation:
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PMID: 20461525 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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Injuries caused by gunshots can produce what bloodstain pattern analysts know as "backspatter." Observations about the presence or absence of backspatter on an individual may be used in court as evidence of guilt or innocence. The discharge of three firearms (.22 caliber revolver, .38 caliber revolver, and .308 caliber rifle) and the resulting impact of bullets on a blood source were recorded using high-speed digital video imaging. Blood droplets, firearm muzzle gases, and ballistic shock waves were visualized using standard reflected light and shadowgraphy imaging techniques. A significant interaction between air currents, muzzle gases, and particulate material emanating from the firearms upon discharge with backspattered blood was observed. Blood droplets, initially spattered back toward the firearm and the shooter, were observed to change direction under the influence of firearm-induced air currents and were blown forward toward and beyond their original source location. Implications for experts testifying in court and for bloodstain pattern instructors are discussed. |
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Authors:
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Michael C Taylor; Terry L Laber; Barton P Epstein; Dan S Zamzow; David P Baldwin |
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Publication Detail:
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Type: Journal Article Date: 2010-05-12 |
Journal Detail:
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Title: International journal of legal medicine Volume: 125 ISSN: 1437-1596 ISO Abbreviation: Int. J. Legal Med. Publication Date: 2011 Sep |
Date Detail:
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Created Date: 2011-08-15 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9101456 Medline TA: Int J Legal Med Country: Germany |
Other Details:
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Languages: eng Pagination: 617-28 Citation Subset: IM |
Affiliation:
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Institute of Environmental Science and Research Limited (ESR), P O Box 29-181, Christchurch, New Zealand, michael.taylor@esr.cri.nz. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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