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NCJ Number: NCJ 241095     Find in a Library
Title: Persistence of Biological Traces in Gun Barrels After Fatal Contact Shots
Journal: Forensic Science International: Genetics  Volume:7  Issue:1  Dated:January 2013  Pages:22 to 27
Author(s): Christian Schyma ; Burkhard Madea ; Cornelius Courts
Date Published: 01/2013
Page Count: 6
Publisher: http://www.elsevier.com 
Type: Report (Study/Research)
Language: English
Country: United States of America
Annotation: The aim of the present prospective study was to investigate whether victim DNA could reliably be recovered from the inside of the barrels of firearms that were used in 20 cases of homicidal or suicidal close contact shots.
Abstract: In the majority of cases suicidal shots are put to the head. Typically the gun's muzzle is held against the head. The aim of the present prospective study was to investigate whether victim DNA could reliably be recovered from the inside of the barrels of firearms that were used in 20 cases of homicidal or suicidal close contact shots. Additionally, it was investigated whether such biological traces were eliminated by subsequent firing. After autopsy sterile swabs were used to collect samples from the anterior part of the barrel thereby avoiding the muzzle. In some cases prior endoscopic inspection had revealed traces of blood and soft tissue in the barrel. For 16 cases, another swab was used to also collect sample from the posterior part of the barrel entering from its rear end. Then one shot was fired through the weapon using the same ammunition as in the suicidal shot and the sampling procedure was repeated. DNA was extracted using a magnetic beads based protocol, quantified, and STR-systems were amplified using several commercially available multiplex-STR-PCR-kits. For samples taken after the first shot DNA-analysis yielded STR profiles eligible for reliable individualization in 17 of 20 cases. After a second shot had been fired 8 or more STR systems were amplified successfully in 14 of 20 barrels. (Published Abstract)
Main Term(s): Forensics/Forensic Sciences
Index Term(s): Suicide ; Victim identification ; Investigative techniques ; Homicide investigations ; DNA fingerprinting ; Foreign criminal justice research ; Firearms deaths ; Germany
   
  To cite this abstract, use the following link:
https://www.ncjrs.gov/App/Publications/abstract.aspx?ID=263183

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