The NIJ Journal presents research-based information that can help inform policy decisions and improve understanding of the criminal justice system. This issue features articles titled: Health and Criminal Justice: Strengthening the Partnership; Doctors Focus on the Threat to Health From Violence; Understanding the Roots of Crime: The Project on Human Development in Chicago Neighborhoods; Adopting the Health Care Model to Prevent Victimization; The Health-Justice Interface: A New Arena for Police; Expanding the Role of the Local Prosecutor; Health Care Needs in Corrections: NIJ Responds; Questions Most Frequently Asked About the ADA by Criminal Justice Professionals; and You People, Violence, and Guns What NIJ Is Doing.