Mark Costanzo and Daniel Krauss reveal how psychological science can improve evidence gathering, aid legal decision making, lower crime rates, and promote justice. Drawing on compelling examples from real trials, landmark cases, and real-world legal procedures, Forensic and Legal Psychology explores how theory and research can deepen our understanding of key actors in the legal system. Accessible and wide-ranging, this text shows how key research findings in social, cognitive, clinical, and developmental psychology apply to virtually every aspect of the legal system that psychologists have studied.