Persistence of biological traces in gun Barrels after fatal contact shots

Courts, Cornelius; Gahr, Britta; Madea, Burkhard; Schyma, Christian (2014). Persistence of biological traces in gun Barrels after fatal contact shots. Journal of forensic sciences, 7(1), pp. 22-27. Wiley 10.1016/j.fsigen.2012.05.008

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Backspatter from wounds caused by contact shots against a biological target had before been shown to be propelled into firearms' barrels where they can persist and be retrieved from as relevant forensic evidence. Herein, that insight was applied to the investigation of a case of multiple familial homicide with a firearm. Samples of backspatter were collected from the firearm using DNA-free swabs. DNA was extracted from the swabs, and 16 STR systems were PCR-amplified to generate DNA profiles of all victims shot by the firearm. The quality of the resulting DNA profiles was sufficient to exclude the perpetrator as donor and to differentiate the three closely related victims thereby proving that all three victims had been shot by the same firearm from very close or contact distance. A key insight gained from this case was that not only a firearms' barrel inside but other inner surfaces may be charged with profilable DNA.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Service Sector > Institute of Legal Medicine > Forensic Medicine

UniBE Contributor:

Schyma, Christian

Subjects:

600 Technology > 610 Medicine & health

ISSN:

0022-1198

Publisher:

Wiley

Language:

English

Submitter:

Katrin Renfer

Date Deposited:

06 Aug 2014 17:05

Last Modified:

11 Nov 2015 09:08

Publisher DOI:

10.1016/j.fsigen.2012.05.008

BORIS DOI:

10.7892/boris.44764

URI:

https://boris.unibe.ch/id/eprint/44764

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