In an effort to determine the state of law enforcement’s participation in offender reentry initiatives, the International Association of Chiefs of Police (IACP) partnered with the U.S. Department of Justice’s, Bureau of Justice Assistance (BJA) to comprehensively examine law enforcement’s role in offender reentry initiatives. The intent was to increase law enforcement’s participation in offender reentry initiatives through the provision of information, sharing of leading practices, and development of products to promote public safety partnerships. This resource guide is the result of this partnered effort. The purpose of the guide is to provide an overview of the information available specifically on law enforcement’s current and emerging role in offender reentry, and to present key strategies, components, and results of law enforcement participation in offender reentry programs. The resource guide is divided into three main sections. Section I provides an overview of the questions and responses law enforcement has and may have about its role in offender reentry, identifies the benefits and challenges the police experience with reentry programs, and provides examples of how law enforcement has developed, implemented, and managed such programs. Section II provides a blueprint for implementing an offender reentry program, as well as real-life examples from the sites visited that exhibit leading practices in law enforcement-involved offender reentry programs. Section III highlights law enforcement agencies that are engaged in offender reentry programs and initiatives. The guide concludes with a glossary of commonly used offender reentry terms and helpful resources and materials used by offender reentry project staff and profiled agencies.