Research and data on youth and delinquency are critical for identifying opportunities and developing strategies to support positive development through prevention and intervention. Responses to youth misbehavior by youth-serving systems—including education, child welfare, behavioral health, and justice systems—can play an important role in promoting or disrupting youths’ healthy social and emotional development. Understanding the complexities of juvenile delinquency requires a multifaceted approach that integrates legal, social, and psychological perspectives. This book aims to provide a comprehensive analysis of various aspects of juvenile justice, from federal criminal law to the impact of incarceration on young offenders.