The interpretation and evaluation of scientific evidence and its presentation in a court of law is central both to the role of the forensic scientist as an expert witness and to the interests of justice. This book aims to provide a thorough and detailed discussion of the principles and practice of evidence interpretation and evaluation by using real cases by way of illustration. The presentation is appropriate for students of forensic science or related disciplines at advanced undergraduate and master's level or for practitioners engaged in continuing professional development activity.

The book is structured in three sections. The first sets the scene by describing and debating the issues around the admissibility and reliability of scientific evidence presented to the court. In the second section, the principles underpinning interpretation and evaluation are explained, including discussion of those formal statistical methods founded on Bayesian inference. The following chapters present perspectives on the evaluation and presentation of evidence in the context of a single type or class of scientific evidence, from DNA to the analysis of documents. For each, the science underpinning the analysis and interpretation of the forensic materials is explained, followed by the presentation of cases which illustrate the variety of approaches that have been taken in providing expert scientific opinion.

Craig Adam is based at the School of Physical and Geographical Sciences, Keele University, Keele, UK. He has been involved in forensic science education and research for almost fifteen years while working at Keele University. Originally a physicist by training, he has particular interests in the mathematical and statistical aspects of the discipline, in addition to his research on the physicochemical characterisation of forensic materials, document analysis and blood dynamics. He has published across all these areas, including the textbook Essential Mathematics and Statistics for Forensic Science, available from Wiley-Blackwell. He has extensive experience in developing teaching resources across the spectrum of forensic science and, over recent years, has focused on the interface between science and the court. This has led him to explore the legal, scientific and statistical perspectives driving the evolution of the crucial step in the progress of scientific evidence from the crime scene through the legal debate to its influence on the ultimate decision by the court.