An application example of the likelihood ratio approach to the evaluation of organic gunshot residues using a fictional scenario and recently published data.

Maitre, M; Horder, M; Kirkbride, KP; Gassner, A-L; Weyermann, C; Gupta, A; Beavis, A; Roux, C

An application example of the likelihood ratio approach to the evaluation of organic gunshot residues using a fictional scenario and recently published data.

Maitre, M Horder, M Kirkbride, KP Gassner, A-L Weyermann, C Gupta, A

Beavis, A Roux, C

Permalink

Publisher:: ELSEVIER IRELAND LTD
Publication Type:: Journal Article
Citation:: Forensic Sci Int, 2022, 335, pp. 111267
Issue Date:: 2022-06

Closed Access

	Filename	Description	Size
	2022_OGSR.pdf	Published version	1.8 MB	Adobe PDF	View/Open

Copyright Clearance Process

Recently Added
In Progress
Closed Access

This item is closed access and not available.

Full metadata record

Field	Value	Language
dc.contributor.author	Maitre, M
dc.contributor.author	Horder, M
dc.contributor.author	Kirkbride, KP
dc.contributor.author	Gassner, A-L
dc.contributor.author	Weyermann, C
dc.contributor.author	Gupta, A https://orcid.org/0000-0003-4957-4008
dc.contributor.author	Beavis, A
dc.contributor.author	Roux, C https://orcid.org/0000-0003-3610-420X
dc.date.accessioned	2022-07-27T01:38:23Z
dc.date.available	2022-03-04
dc.date.available	2022-07-27T01:38:23Z
dc.date.issued	2022-06
dc.identifier.citation	Forensic Sci Int, 2022, 335, pp. 111267
dc.identifier.issn	0379-0738
dc.identifier.issn	1872-6283
dc.identifier.uri	http://hdl.handle.net/10453/159191
dc.description.abstract	The analysis of gunshot residues (GSR) can provide important information with regard to the involvement of a person of interest (POI) in a firearm-related incident. Organic gunshot residues (OGSR) have been investigated in order to provide additional and complementary information to the traditional inorganic gunshot residue (IGSR) particles detected by scanning electron microscopy (SEM). Currently, many procedures and analytical methods have been developed to detect OGSR-related compounds collected from the shooter's hands. However, such studies provide no information regarding the inclusion of such results in an activity level evaluation for discharging a firearm. The aim of this article is to assess the feasibility of using the likelihood ratio (LR) approach as a tool to evaluate OGSR results for activity level propositions. The developed model focuses on the assignment of an LR for several compounds detected in OGSR. A simple worst-case simulation was investigated in order to assess the applicability of the LR approach to evaluate OGSR traces. This simulation highlighted the importance of addressing an appropriate pair of activity level propositions when evaluating the results.
dc.format	Print-Electronic
dc.language	eng
dc.publisher	ELSEVIER IRELAND LTD
dc.relation.ispartof	Forensic Sci Int
dc.relation.isbasedon	10.1016/j.forsciint.2022.111267
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject.classification	Legal & Forensic Medicine
dc.subject.mesh	Firearms
dc.subject.mesh	Hand
dc.subject.mesh	Humans
dc.subject.mesh	Microscopy, Electron, Scanning
dc.subject.mesh	Organic Chemicals
dc.subject.mesh	Wounds, Gunshot
dc.subject.mesh	Hand
dc.subject.mesh	Humans
dc.subject.mesh	Wounds, Gunshot
dc.subject.mesh	Organic Chemicals
dc.subject.mesh	Microscopy, Electron, Scanning
dc.subject.mesh	Firearms
dc.title	An application example of the likelihood ratio approach to the evaluation of organic gunshot residues using a fictional scenario and recently published data.
dc.type	Journal Article
utslib.citation.volume	335
utslib.location.activity	Ireland
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Strength - CFS - Centre for Forensic Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
utslib.copyright.status	closed_access	*
dc.date.updated	2022-07-27T01:38:22Z
pubs.publication-status	Published
pubs.volume	335

Abstract:

The analysis of gunshot residues (GSR) can provide important information with regard to the involvement of a person of interest (POI) in a firearm-related incident. Organic gunshot residues (OGSR) have been investigated in order to provide additional and complementary information to the traditional inorganic gunshot residue (IGSR) particles detected by scanning electron microscopy (SEM). Currently, many procedures and analytical methods have been developed to detect OGSR-related compounds collected from the shooter's hands. However, such studies provide no information regarding the inclusion of such results in an activity level evaluation for discharging a firearm. The aim of this article is to assess the feasibility of using the likelihood ratio (LR) approach as a tool to evaluate OGSR results for activity level propositions. The developed model focuses on the assignment of an LR for several compounds detected in OGSR. A simple worst-case simulation was investigated in order to assess the applicability of the LR approach to evaluate OGSR traces. This simulation highlighted the importance of addressing an appropriate pair of activity level propositions when evaluating the results.

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/159191