Mayor Rahm Emanuel's Law Department again has been sanctioned for withholding records involving a fatal police shooting, marking the eighth time in recent years a federal judge has formally punished the city [of Chicago] for failing to turn over potential evidence in a police misconduct lawsuit. U.S. District Court Judge Joan Gottschall on Tuesday ruled that the city acted in bad faith" when it ignored a court order and made little effort to provide documents to the lawyer for the family of 20-year-old Divonte Young, who was shot and killed by an officer in 2012. In a sharply worded 24-page order, the judge criticized the city for its approach to discovery, the legal process that allows the two sides in a lawsuit to uncover relevant facts. "The City's cavalier attitude toward the discovery process ... warrant findings of willfulness, fault and bad faith," Gottschall wrote. In imposing her punishment, Gottschall ... stripped the city of legal protections that would have allowed its lawyers to withhold some documents from the Young family's lawyer. A Tribune investigation last year that analyzed nearly 450 cases alleging police misconduct since Emanuel took office found that a federal judge had to order the city to turn over potential evidence in nearly 1 of every 5 cases. The issue came to a head in January 2016, when a federal judge sanctioned one city lawyer for intentionally concealing evidence and ... took the rare step of tossing out a jury verdict in favor of the city and ordering a new trial.