The Justice Department has said the Chicago Police Department has been violating people's civil rights for years.
They blasted the nation's second-largest department for using excessive force, which included shooting at people who did not pose a threat and using stun guns on others because they refused to follow commands.
The report was issued after a yearlong investigation, which was sparked by the 2014 death of Laquan McDonald who was shot 16 times by a white officer.
The federal investigation concluded officers were not sufficiently trained or supported, and that many who were accused of misconduct were rarely investigated or disciplined.
The findings come a week before a change in administration, which could reorder the DOJ's priorities.
President-elect Donald Trump's attorney general nominee has said such investigations into police departments can smear entire police departments and harm officer morale..