Psychological science now reveals much about the law’s response to crime. This is the first text to bridge both fields as it presents psychological research and theory relevant to each phase of criminal justice processes. The materials are divided into three parts that follow a comprehensive introduction. The introduction analyses the major legal themes and values that guide criminal justice processes and points to the many psychological issues they raise. Part I examines how the legal system investigates and apprehends criminal suspects. Topics range from the identification, searching and seizing to the questioning of suspects. Part II focuses on how the legal system establishes guilt. To do so, it centres on the process of bargaining and pleading cases, assembling juries, providing expert witnesses, and considering defendants’ mental states. Part III focuses on the disposition of cases. Namely, that part highlights the process of sentencing defendants, predicting criminal tendencies, treating and controlling offenders, and determining eligibility for such extreme punishments as the death penalty. The format seeks to give readers a feeling for the entire criminal justice process and for the role psychological science has and can play in it.