Presents an overview of quantitative measurements in forensic science Outlines a foundation of basic mathematical and statistical concepts using applied examples from forensic science Provides practitioners the tools required both to develop uncertainty estimations and to evaluate and improve existing ones Describes how to build uncertainty budgets and worksheets Suggests top-level practices and procedures for seized drug analysis, toxicology, breath and blood alcohol, and distance/length measurements Offers a wealth of free, and easily accessible, supplementary references and Web resource

Forensic metrology is the application of scientific measurement to the investigation and prosecution of crime. Forensic measurements are relied upon to determine breath and blood alcohol and drug concentrations, weigh seized drugs, perform accident reconstruction, and for many other applications. Forensic metrology provides a basic framework for th

In 1992 the National Research Council issued DNA Technology in Forensic Science, a book that documented the state of the art in this emerging field. Recently, this volume was brought to worldwide attention in the murder trial of celebrity O. J. Simpson. The Evaluation of Forensic DNA Evidence reports on developments in population genetics and statistics since the original volume was published. The committee comments on statements in the original book that proved controversial or that have been misapplied in the courts. This volume offers recommendations for handling DNA samples, performing calculations, and other aspects of using DNA as a forensic toolâ€"modifying some recommendations presented in the 1992 volume. The update addresses two major areas: Determination of DNA profiles. The committee considers how laboratory errors (particularly false matches) can arise, how errors might be reduced, and how to take into account the fact that the error rate can never be reduced to zero. Interpretation of a finding that the DNA profile of a suspect or victim matches the evidence DNA. The committee addresses controversies in population genetics, exploring the problems that arise from the mixture of groups and subgroups in the American population and how this substructure can be accounted for in calculating frequencies. This volume examines statistical issues in interpreting frequencies as probabilities, including adjustments when a suspect is found through a database search. The committee includes a detailed discussion of what its recommendations would mean in the courtroom, with numerous case citations. By resolving several remaining issues in the evaluation of this increasingly important area of forensic evidence, this technical update will be important to forensic scientists and population geneticistsâ€"and helpful to attorneys, judges, and others who need to understand DNA and the law. Anyone working in laboratories and in the courts or anyone studying this issue should own this book.

Scores of talented and dedicated people serve the forensic science community, performing vitally important work. However, they are often constrained by lack of adequate resources, sound policies, and national support. It is clear that change and advancements, both systematic and scientific, are needed in a number of forensic science disciplines to ensure the reliability of work, establish enforceable standards, and promote best practices with consistent application. Strengthening Forensic Science in the United States: A Path Forward provides a detailed plan for addressing these needs and suggests the creation of a new government entity, the National Institute of Forensic Science, to establish and enforce standards within the forensic science community. The benefits of improving and regulating the forensic science disciplines are clear: assisting law enforcement officials, enhancing homeland security, and reducing the risk of wrongful conviction and exoneration. Strengthening Forensic Science in the United States gives a full account of what is needed to advance the forensic science disciplines, including upgrading of systems and organizational structures, better training, widespread adoption of uniform and enforceable best practices, and mandatory certification and accreditation programs. While this book provides an essential call-to-action for congress and policy makers, it also serves as a vital tool for law enforcement agencies, criminal prosecutors and attorneys, and forensic science educators.

Results of measurements and conclusions derived from them constitute much of the technical information produced by the National Institute of Standards and Technology (NIST). In July 1992 the Director of NIST appointed an Ad Hoc Committee on Uncertainty Statements and charged it with recommending a policy on this important topic. The Committee concluded that the CIPM approach could be used to provide quantitative expression of measurement that would satisfy NIST¿s customers¿ requirements. NIST initially published a Technical Note on this issue in Jan. 1993. This 1994 edition addresses the most important questions raised by recipients concerning some of the points it addressed and some it did not. Illustrations.

Integrity and honesty are the hallmarks of science - and especially so in the case of forensic science - making the study and practice of ethics essential to the field. Ethics and the Practice of Forensic Science, Third Edition directly addresses common stressors that can induce, or lead professionals - working in forensic laboratories, law enforcement, the judicial system, and at crime scenes - to commit misconduct. While forensic scientists, investigators, and experts are intrinsically ethical by nature, the reality is that these individuals face challenges including departmental or political pressures, lack of training, and conflicting standards. The difference, however, is that the work done by forensic professionals has the ability to compromise another person’s freedom, potentially leading to arrest, incarceration, and miscarriages of justice. Police and forensic professionals confront ethical dilemmas every day, some situations that fall within clear protocols or standards and others that frequently have no definitive answers. Ethics and the Practice of Forensic Science, Third Edition includes updated information and case studies, as well as recent research findings focused on ethics in forensic science. Chapters examine investigation and police culture through the lens of professional challenges, incorporating important information about the history of wrongful convictions, and including recent developments in overturned wrongful convictions, and the work of various innocence projects. Throughout the book, case examples of bias, ethical violations, and instances of tampering with evidence present the dangers of compromising one’s ethical standards. Through such cases, the book sheds light on the problem and offers alternative courses of action - presenting examples of what to do, and what not to do, when faced with ethical decisions in gathering, handling, analyzing, and presenting evidence.

The fifth edition of the best-selling Principles in Forensic Toxicology continues in the tradition of excellence in academic publishing. With over 10 years of classroom-tested and continually updated content, the new edition contains significant updates and 7 new chapters on new topics including drug-facilitated crimes, derivatization, quantitation, measurement uncertainty/traceability, statistics, oral fluid testing, and drugs in embalmed specimens. Part One covers the major sub-disciplines of forensic toxicology in addition to pharmacological concepts. Part Two addresses specimen preparation, laboratory testing and instrumental analysis, while Part Three discusses common analytes including cocaine, opioids, alcohol, and marijuana. Adopted for courses in many of the top universities for forensic science and used by respected medical examiner’s offices and crime laboratories worldwide, Principles of Forensic Toxicology prepares the next generation of forensic toxicologists and continues to be an important reference in professional practice.