Using Bayesian networks to track DNA movement through complex transfer scenarios.

Détails

ID Serval
serval:BIB_8192A37A0B38
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Using Bayesian networks to track DNA movement through complex transfer scenarios.
Périodique
Forensic science international. Genetics
Auteur(s)
Taylor D., Samie L., Champod C.
ISSN
1878-0326 (Electronic)
ISSN-L
1872-4973
Statut éditorial
Publié
Date de publication
09/2019
Peer-reviewed
Oui
Volume
42
Pages
69-80
Langue
anglais
Notes
Publication types: Journal Article
Publication Status: ppublish
Résumé
Trace DNA and the manner in which it is transferred from item to item is a common topic arising in forensic science, both in case evaluations, and in Court testimony. In order to assign the probability of obtaining DNA findings, given competing propositions that specify transfer mechanisms, consideration must be given to a number of factors. Previous work by the authors developed a simple Object-Oriented Bayesian Network (OOBN) that pooled numerous published studies in order to attempt evaluation of trace DNA results given such propositions. In this work, we expand on the previously published OOBN and formalise a number of class networks that can be used together in a logical way to consider DNA movement through complex chains of transfer events. Specifically, we develop an OOBN that considers the two-way transfer of DNA that occurs when two items contact, and allows for the sampling of intermediary items involved in the chain of transfers. The aim is to show that adopting an approach involving basic building blocks, we offer the possibility to tackle complex and various cases for which the OOBN will be obtained by combining their elementary blocks. We conclude with a demonstration of applying the OOBN being applied to a chain of transfers in a case scenario.
Mots-clé
Activity level propositions, Background DNA, Contact DNA, DNA persistence, DNA transfer, Object-oriented Bayesian networks
Pubmed
Création de la notice
15/07/2019 16:03
Dernière modification de la notice
11/10/2019 16:43
Données d'usage