Citation

Kerkhoff W, Stoel RD, Mattijssen EJAT, Berger CEH, Didden FW, Kerstholt JH. Sci. Justice 2018; 58(4): 258-263.

Affiliation

University of Twente, PO Box 217, 7500 AE Enschede, The Netherlands; TNO, PO Box 23, 3769 ZG Soesterberg, The Netherlands.

Copyright

(Copyright © 2018, Forensic Science Society, Publisher Elsevier Publishing)

DOI

10.1016/j.scijus.2018.03.006

PMID

29895457

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.

Copyright © 2018 The Chartered Society of Forensic Sciences. Published by Elsevier B.V. All rights reserved.

Language: en

Keywords

Blind testing; Bullet and cartridge case comparison; Fake cases; Part declared testing; Proficiency test