“The Justice Department announced today that it has found reasonable cause to believe that the Chicago Police Department (CPD) engages in a pattern or practice of using force, including deadly force, in violation of the Fourth Amendment of the Constitution. The department found that CPD officers’ practices unnecessarily endanger themselves and result in unnecessary and avoidable uses of force. The pattern or practice results from systemic deficiencies in training and accountability, including the failure to train officers in de-escalation and the failure to conduct meaningful investigations of uses of force. ”