This report provides background information on why Congress gave the Civil Rights Division authority to address systemic police misconduct, how the Division opens pattern-or-practice investigations, what an investigation involves, and how the Division negotiates reform agreements. The report then outlines the common threads among the Division’s current generation of police reform agreements, explaining how the Division’s model promotes sustainable reform and constitutional, effective policing, as well as how those agreements come to a close. Finally, the report discusses the evidence to date of the impact of the Division’s pattern-or-practice work on police reform, as well as future directions for research and reflection on that impact.