The U.S. Department of Justice Civil Rights Division’s patterns and practice investigation into the Chicago Police Department is the largest in the DOJ’s history, U.S. Attorney for the Northern District of Illinois Zachary T. Fardon said Monday.Fardon said he was at U.S. Attorney General Loretta E. Lynch’s side when she announced the investigation into the police department’s use of force, including racial disparities in use of force and systems of accountability last December.Since then, Fardon and …