The consideration of witness testimony had traditionally been a task left to fact-finders with scant guidance from legal professionals. As a result, various practices have developed during the investigative and trial process which can obscure or even eradicate critical material. Miscarriages of justice will continue to occur, so long as those working within the justice system continue to accept witnesses and their testimony at face value. This book aims to make practitioners, as well as the fact-finders and those who guide them, aware of a wide range of perspectives on witness testimony. Each contributor identifies bad practice and puts forward ideas for improvement or removal of previously acceptable investigative and forensic methods.

Credibility assessment refers to any attempt to ascertain truthfulness. Other terms which have been used to refer to the assessment of credibility include the detection of deception and lie detection. The term lie detection has become virtually synonymous with the use of the polygraph and can no longer be used to refer to the range of procedures currently employed to assess credibility. Also, both lie detection and the detection of deception have a negative cast which does not fully capture the orientation of current approaches to credibility. Consequently, the term credibility assessment has emerged recently as the preferred label. The goal of credibility assessment is typically the determination of the truth of a statement or be found in set of statements. The need or desire to make such an assessment can every human context from marital relations through clinical examinations to police and court interrogations. Examples of the kinds of statements which require credibility assessment are: 1) A child's assertion that she or he has been sexually abused. 2) The claim by a previously suicidal person that he or she has recovered and will not attempt suicide again. 3) The denial of guilt by a suspect in a criminal investigation. 4 ) The confident statement of a witness that he or she is sure in his or her identification of a thief. 5) The vow of loyalty by a potential employee for a security job. It is necessary to assess the credibility of these and similar statements.

This book provides a comprehensive and easily accessible guide to the decision-making and actions of the complete spectrum of practitioner involvement in the criminal justice process, right from initial investigation through to court-room proceedings.

Identifying the Culprit: Assessing Eyewitness Identification makes the case that better data collection and research on eyewitness identification, new law enforcement training protocols, standardized procedures for administering line-ups, and improvements in the handling of eyewitness identification in court can increase the chances that accurate identifications are made. This report explains the science that has emerged during the past 30 years on eyewitness identifications and identifies best practices in eyewitness procedures for the law enforcement community and in the presentation of eyewitness evidence in the courtroom. In order to continue the advancement of eyewitness identification research, the report recommends a focused research agenda.

Witness testimony in sexual cases is a complex and controversial topic and this practical guide provides comprehensive and balanced advice for criminal justice professionals at all stages of involvement in the legal process. It draws together essential legal and scientific information for all professionals working in this field.

Forensic Testimony: Science, Law and Expert Evidence—favored with an Honorable Mention in Law & Legal Studies at the Association of American Publishers' 2015 PROSE Awards—provides a clear and intuitive discussion of the legal presentation of expert testimony. The book delves into the effects, processes, and battles that occur in the presentation of opinion and scientific evidence by court-accepted forensic experts. It provides a timely review of the United States Federal Rules of Evidence (FRE) regarding expert testimony, and includes a multi-disciplinary look at the strengths and weaknesses in forensic science courtroom testimony. The statutes and the effects of judicial uses (or non-use) of the FRE, Daubert, Kumho, and the 2009 NAS Report on Forensic Science are also included. The presentation expands to study case law, legal opinions, and studies on the reliability and pitfalls of forensic expertise in the US court system. This book is an essential reference for anyone preparing to give expert testimony of forensic evidence. - Honorable Mention in the 2015 PROSE Awards in Law & Legal Studies from the Association of American Publishers - A multi-disciplinary forensic reference examining the strengths and weaknesses of forensic science in courtroom testimony - Focuses on forensic testimony and judicial decisions in light of the Federal Rules of Evidence, case interpretations, and the NAS report findings - Case studies, some from the Innocence Project, assist the reader in distinguishing good testimony from bad