Using the likelihood ratio in bloodstain pattern analysis Champod, Christophe
dc.contributor.department Mechanical Engineering
dc.contributor.department Industrial and Manufacturing Systems Engineering
dc.contributor.department Statistics 2021-12-22T16:23:27Z 2021-12-22T16:23:27Z 2021-10-29
dc.description.abstract There is an apparent paradox that the likelihood ratio (LR) approach is an appropriate measure of the weight of evidence when forensic findings have to be evaluated in court, while it is typically not used by bloodstain pattern analysis (BPA) experts. This commentary evaluates how the scope and methods of BPA relate to several types of evaluative propositions and methods to which LRs are applicable. As a result of this evaluation, we show how specificities in scope (BPA being about activities rather than source identification), gaps in the underlying science base, and the reliance on a wide range of methods render the use of LRs in BPA more complex than in some other forensic disciplines. Three directions are identified for BPA research and training, which would facilitate and widen the use of LRs: research in the underlying physics; the development of a culture of data sharing; and the development of training material on the required statistical background. An example of how recent fluid dynamics research in BPA can lead to the use of LR is provided. We conclude that an LR framework is fully applicable to BPA, provided methodic efforts and significant developments occur along the three outlined directions.
dc.description.comments This is the published version of the following article: Attinger, Daniel, Kris De Brabanter, and Christophe Champod. "Using the likelihood ratio in bloodstain pattern analysis." Journal of Forensic Sciences (2021). DOI: 10.1111/1556-4029.14899. Attribution 4.0 International (CC BY 4.0). Copyright 2021 The Authors. Posted with permission.
dc.language.iso en_US
dc.publisher Wiley
dc.source.uri *
dc.subject blood
dc.subject bloodstain pattern analysis
dc.subject courtroom testimony
dc.subject likelihood ratio
dc.subject statistics
dc.subject.disciplines DegreeDisciplines::Social and Behavioral Sciences::Legal Studies::Forensic Science and Technology
dc.subject.disciplines DegreeDisciplines::Physical Sciences and Mathematics::Statistics and Probability
dc.title Using the likelihood ratio in bloodstain pattern analysis
dc.type Article
dspace.entity.type Publication
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