Forensic DNA Trace Evidence Interpretation: Activity Level Propositions and Likelihood Ratios

Forensic DNA Trace Evidence Interpretation: Activity Level Propositions and Likelihood Ratios provides a comprehensive guide to evaluating forensic biology evidence using activity level propositions and likelihood ratios. It explains basic concepts, foundational theory, and the laws of probability, and discusses transfer, persistence, prevalence, and recovery of biological material. The book also covers the evaluation process, including structuring case information, formulating propositions, and using Bayesian networks. It demonstrates how activity level evaluations are applied to questions about body fluids and includes chapters on reporting of results and implementation in a forensic laboratory. Four cases are used as examples to illustrate the theory in practice.

Format: Paperback / softback
Length: 566 pages
Publication date: 30 May 2023
Publisher: Taylor & Francis Ltd

Forensic DNA Trace Evidence Interpretation: Activity Level Propositions and Likelihood Ratios is a comprehensive guide that provides essential foundational knowledge for readers to understand the practice of evaluating forensic biology evidence based on activity level propositions and to apply this practice effectively in forensic institutions. The book begins by introducing fundamental concepts and foundational theory, drawing upon research and studies accumulated in forensic journal literature over the past two decades. It explains the laws of probability, showcasing how they can be utilized to derive the likelihood ratio, a crucial metric used throughout the book to express the strength of evidence for any evaluation. Concepts such as the hierarchy of propositions, the distinction between experts working in investigative or evaluative modes, and the practice of case assessment and interpretation are elucidated to provide the reader with a comprehensive understanding of the topics crucial for evaluating evidence.

Activity level evaluations are explored in relation to biological material transferred from one object to another, the duration for which biological material can persist on an item or during an event, the ability to recover biological material from sampled objects for forensic testing, and the expected prevalence of biological material on objects in our environment. These concepts are thoroughly discussed, along with the factors that influence each of them.

The authors then proceed to explain the evaluation process, outlining how case information can be structured and propositions formulated. This includes the derivation of a likelihood ratio formula to assess the strength of evidence. By employing these principles and methodologies, readers will gain the skills and knowledge necessary to effectively interpret forensic DNA trace evidence, contributing to the resolution of criminal cases and the protection of public safety.

Weight: 1338g
Dimension: 178 x 254 x 40 (mm)
ISBN-13: 9781032225814