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Article

Who Packed the Drugs? Application of Bayesian Networks to Address Questions of DNA Transfer, Persistence, and Recovery from Plastic Bags and Tape

1
Department of Forensic Sciences, Oslo University Hospital, 0372 Oslo, Norway
2
Faculty of Sciences, University of Lisbon, 1749-016 Lisbon, Portugal
3
Department of Forensic Medicine, University of Oslo, 0315 Oslo, Norway
*
Author to whom correspondence should be addressed.
Contributed equally to this work.
Academic Editor: Emiliano Giardina
Genes 2022, 13(1), 18; https://doi.org/10.3390/genes13010018
Received: 8 December 2021 / Revised: 16 December 2021 / Accepted: 17 December 2021 / Published: 22 December 2021
(This article belongs to the Special Issue Advances in Forensic Genetics)
When DNA from a suspect is detected in a sample collected at a crime scene, there can be alternative explanations about the activity that may have led to the transfer, persistence and recovery of his/her DNA. Previous studies have shown that DNA can be indirectly transferred via intermediate surfaces and that DNA on a previously used object can persist after subsequent use of another individual. In addition, it has been shown that a person’s shedder status may influence transfer, persistence, prevalence, and recovery of DNA. In this study we have investigated transfer persistence and recovery on zip-lock bags and tape, which are commonly encountered in drug cases and how the shedder status of the participants influenced the results. A probabilistic framework was developed which was based on a previously described Bayesian network with case-specific modifications. Continuous modelling of data was used to inform the Bayesian networks and two case scenarios were investigated. In the specific scenarios only moderate to low support for Hp was obtained. Applying a continuous model based on the profile quality can change the LRs. View Full-Text
Keywords: transfer; persistence; activity; Bayesian networks transfer; persistence; activity; Bayesian networks
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MDPI and ACS Style

Fonneløp, A.E.; Faria, S.; Shanthan, G.; Gill, P. Who Packed the Drugs? Application of Bayesian Networks to Address Questions of DNA Transfer, Persistence, and Recovery from Plastic Bags and Tape. Genes 2022, 13, 18. https://doi.org/10.3390/genes13010018

AMA Style

Fonneløp AE, Faria S, Shanthan G, Gill P. Who Packed the Drugs? Application of Bayesian Networks to Address Questions of DNA Transfer, Persistence, and Recovery from Plastic Bags and Tape. Genes. 2022; 13(1):18. https://doi.org/10.3390/genes13010018

Chicago/Turabian Style

Fonneløp, Ane E., Sara Faria, Gnanagowry Shanthan, and Peter Gill. 2022. "Who Packed the Drugs? Application of Bayesian Networks to Address Questions of DNA Transfer, Persistence, and Recovery from Plastic Bags and Tape" Genes 13, no. 1: 18. https://doi.org/10.3390/genes13010018

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