Redeploy Illinois represents a State response to juvenile justice policies in Illinois that resulted in limited opportunities for local jurisdictions to develop youth programs for managing delinquent youth, while increasingly shifting the fiscal burden onto state agencies, particularly IDOC and now IDJJ. This response, as indicated above, represents the concerted efforts of several key statewide constituents representing youth advocates, justice system agencies, and policymakers. This response was also informed by several decades of rigorous research into juvenile justice policy and the effectiveness of juvenile justice programs. This section summarizes the research and evidence base that supported the development and implementation of Redeploy Illinois, and that continues to support its expansion and evaluation.