The Cleveland police department in the United States has agreed to train officers to minimise racial bias and the use of excessive force in a deal with the Department of Justice.
The move follows a pattern of abuses was detailed in a report last year, officials said today.
The agreement, which requires the approval of a federal judge, would also provide a road map for changes to other departments as policing across the US has become a flashpoint for racial tensions.
"It will define who we are as a people and who we are as a city," Cleveland Mayor Frank Jackson told a news conference.
Authorities made the announcement about strict oversight of the Cleveland police three days after a judge acquitted a white city police officer of manslaughter charges in the fatal shooting of an unarmed black couple in 2012.
The couple, Timothy Russell and Malissa Williams, were in a car and were shot by officer Michael Brelo after a lengthy chase by police.
Saturday's verdict led to protests, the latest demonstrations over deaths of black men at the hands of police, most recently in Baltimore.
Under the agreement, Cleveland's police department will be tracked by a monitor either agreed to by the city and Justice Department or named by a federal judge. A civilian will head the department's internal affairs division.
US Attorney Steven Dettelbach said the rules issued under a consent decree is "way more than talk" and builds on what is good in the department and aims to improve policing where it has lagged.
The Justice Department concluded a 21-month investigation in December that found the Cleveland police engaged in widespread use of excessive force.
The investigation found incidents of officers shooting civilians in the head when deadly force was not justified and dealing too forcefully with the mentally ill.
Less than two weeks before the Justice Department released its report on Cleveland police last year, a Cleveland police officer fatally shot 12-year-old Tamir Rice, who turned out to be carrying a replica handgun that fires plastic pellets.
The Justice Department has said its civil rights division, the US attorney's office and the FBI were reviewing testimony and evidence from Brelo's state trial to determine if federal action would be taken.
Ahead of Tuesday's announcement, more than 200 protesters demonstrated outside Cleveland City Hall chanting Rice's name along with Russell's and Williams, and singing the civil rights anthem We Shall Overcome.
