Glass-containing gunshot residues and particles of industrial and occupational origins: Considerations for evaluating GSR traces
Kelsey E Seyfang, Nick Lucas, Kahlee E Redman, Rachel S Popelka-Filcoff, Hilton J Kobus, K Paul Kirkbride
FORENSIC SCIENCE INTERNATIONAL | ELSEVIER IRELAND LTD | Published : 2019
In an ideal case, the value of traces would be determined numerically and presented through the use of likelihood ratios or verbal-equivalent scales. A problem in the evaluation of gunshot residue (GSR) evidence using these models is that in many shooting scenarios insufficient data exist to support a quantitative model of interpretation. The complex relationship that exists between ammunition composition and post-firing residues makes quantitative interpretation more difficult for GSR than for other traces such as glass. When evaluating the significance of traces in a quantitative model, the value of a trace is reduced as the number of random sources that could produce the trace increases. ..View full abstract
This work is supported in part by a Premier's Research and Industry Fund Grant from the South Australian Government Department of State Development.The authors acknowledge the expertise and insights provided by staff at Forensic Science SA and financial support from the Ross Vining Fund, which is provided via Forensic Science SA.