From the Executive Summary: "On December 7, 2015, the United States Department of Justice (DOJ), Civil Rights Division, Special Litigation Section, and the United States Attorney's Office for the Northern District of Illinois, jointly initiated an investigation of the City of Chicago's Police Department (CPD) and the Independent Police Review Authority (IPRA). This investigation was undertaken to determine whether the Chicago Police Department is engaging in a pattern or practice of unlawful conduct and, if so, what systemic deficiencies or practices within CPD, IPRA, and the City might be facilitating or causing this pattern or practice. Our investigation assessed CPD's use of force, including deadly force, and addressed CPD policies, training, reporting, investigation, and review related to officer use of force. The investigation further addressed CPD's and IPRA's systems of accountability both as they relate to officer use of force and officer misconduct, including the intake, investigation, and review of allegations of officer misconduct, and the imposition of discipline or other corrective action. We also investigated racial, ethnic, or other disparities in CPD's force and accountability practices, and assessed how those disparities inform the breakdown in community trust. [...] This investigation was initiated as Chicago grappled with the aftermath of the release of a video showing a white police officer fatally shooting black teenager Laquan McDonald. This aftermath included protests, murder charges for the involved officer, and the resignation of Chicago's police superintendent. The McDonald incident was widely viewed as a tipping point-igniting longstanding concerns about CPD officers' use of force, and the City's systems for detecting and correcting the unlawful use of force."
United States Department of Justice: https://www.justice.gov/