In Chicago, the Justice Department said Friday that Chicago police officers routinely violate civil rights, target communities of color with excessive force and maintain a “code of silence” to stymie investigations into abuses. Attorney General Loretta Lynch summarized the findings of a 13-month investigation of the Chicago Police Department.

Loretta Lynch: “On the basis of this exhaustive review, the Department of Justice has concluded that there is reasonable cause to believe that the Chicago Police Department engages in a pattern or practice of use of excessive force in violation of the Fourth Amendment to the Constitution.”

The investigation began in December 2015 after the release of a video showing the death of 17-year-old African American Laquan McDonald, who was shot 16 times in by white police officer Jason Van Dyke. Chicago Mayor Rahm Emanuel on Friday agreed in principle to negotiate a consent decree for a federal monitor to oversee the Chicago Police Department.