A part-declared blind testing program in firearms examination

W. Kerkhoff; R. D. Stoel; E. J.A.T. Mattijssen; C. E.H. Berger; F. W. Didden; J. H. Kerstholt

doi:10.1016/j.scijus.2018.03.006

A part-declared blind testing program in firearms examination

W. Kerkhoff^* (Corresponding Author), R. D. Stoel, E. J.A.T. Mattijssen, C. E.H. Berger, F. W. Didden, J. H. Kerstholt

^*Corresponding author for this work

Psychology of Conflict, Risk and Safety

Research output: Contribution to journal › Article › Academic › peer-review

14 Citations (Scopus)

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Abstract

In 2015 and 2016 the Central Unit of the Dutch National Police created and submitted 21 cartridge case comparison tests as real cases to the Netherlands Forensic Institute (NFI), under supervision of the University of Twente (UT). A total of 53 conclusions were drawn in these 21 tests. For 31 conclusions the underlying ground truth was “positive”, in the sense that it addressed a cluster of cartridge cases that was fired from the same firearm. For 22 conclusions the ground truth was “negative”, in the sense that the cartridge cases were fired from different firearms. In none of the conclusions, resulting from examinations under casework conditions, misleading evidence was reported. All conclusions supported the hypothesis reflecting the ground truth. This article discusses the design and results of the tests in more detail.

Original language	English
Pages (from-to)	258-263
Number of pages	6
Journal	Science & justice
Volume	58
Issue number	4
DOIs	https://doi.org/10.1016/j.scijus.2018.03.006
Publication status	Published - Jul 2018

Keywords

Blind testing
Bullet and cartridge case comparison
Fake cases
Part declared testing
Proficiency test
n/a OA procedure

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10.1016/j.scijus.2018.03.006

Cite this

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title = "A part-declared blind testing program in firearms examination",

abstract = "In 2015 and 2016 the Central Unit of the Dutch National Police created and submitted 21 cartridge case comparison tests as real cases to the Netherlands Forensic Institute (NFI), under supervision of the University of Twente (UT). A total of 53 conclusions were drawn in these 21 tests. For 31 conclusions the underlying ground truth was “positive”, in the sense that it addressed a cluster of cartridge cases that was fired from the same firearm. For 22 conclusions the ground truth was “negative”, in the sense that the cartridge cases were fired from different firearms. In none of the conclusions, resulting from examinations under casework conditions, misleading evidence was reported. All conclusions supported the hypothesis reflecting the ground truth. This article discusses the design and results of the tests in more detail.",

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AU - Didden, F. W.

AU - Kerstholt, J. H.

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A part-declared blind testing program in firearms examination

Abstract

Keywords

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