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NCJ Number: 229758 Find in a Library
Title: Expert Trigger Pull Uncertainty
Journal: Forensic Magazine  Volume:6  Issue:6  Dated:December 2009/January 2010  Pages:10,12,13,14
Author(s): Dana Sevigny; Jeff Salyards
Date Published: December 2009
Page Count: 4
Publisher: http://www.viconpublishing.com 
Type: Guideline
Format: Article
Language: English
Country: United States of America
Annotation: This article provides advice to forensic laboratories on being comfortable with its uncertainty calculations.
Abstract: When measuring forensic evidence, ISO regulations require that forensic laboratories document how uncertainty in the results was calculated. This article provides advice to laboratories on being comfortable with these calculations. Using trigger pull measurements as an example, three questions are asked to make sure the examiner is using the correct procedures to calculate uncertainty. The article discusses how probability measurements can reduce the uncertainty of the testing results. The authors provide an overview of the ISO requirement regarding laboratory procedures for calculating uncertainty of measurements. The authors next address the final aspect of the examination process, deciding the best way to report the results to reduce the possibility of misrepresentation. Several ethical issues regarding presentation of the findings are discussed. Figures
Main Term(s): Forensic sciences
Index Term(s): Crime laboratories; Crime laboratory management; Criminalistics; Evidence identification; Evidence technicians; Scientific testimony
To cite this abstract, use the following link:
http://www.ncjrs.gov/App/publications/abstract.aspx?ID=251790

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