Automatic Comparison and Evaluation of Impressions Left by a Firearm on Fired Cartridge Cases

Détails

ID Serval
serval:BIB_FB07A37D2A0A
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Automatic Comparison and Evaluation of Impressions Left by a Firearm on Fired Cartridge Cases
Périodique
Journal of Forensic Sciences
Auteur(s)
Riva F., Champod C.
ISSN
1556-4029
ISSN-L
1556-4029
Statut éditorial
Publié
Date de publication
05/2014
Peer-reviewed
Oui
Volume
59
Numéro
3
Pages
637-647
Langue
anglais
Résumé
Recent years have been characterized by a series of publications in the field of firearms investigation questioning the reliability and objectivity of such examination. This research investigates new solutions to decrease the subjective component affecting the evaluation that follows the comparison of impressions left by a firearm on the surface of spent cartridge cases. An automatic comparison system based on 3D measurements has been developed and coupled to a bivariate evaluative model allowing assigning likelihood ratios. Based on a dataset of 79 pistols (all SIG Sauer 9 mm Luger caliber), the system shows a very high discriminating power and the LRs that it provides are very indicative of the true state under both the prosecution and the defense propositions. For example, likelihood ratios exceeding a billion are predominantly obtained when impressions originating from the same source are compared. The system is also characterized by relatively low rates (≤1%) of misleading evidence depending on the firearm considered.
Mots-clé
forensic science, firearms identification, likelihood ratio, cartridge cases, 3D topographies, evaluation
Création de la notice
16/06/2014 9:03
Dernière modification de la notice
03/03/2018 22:57
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