WASHINGTON—The police response to unrest in Ferguson, Missouri, last summer offers lessons in how not to handle mass demonstrations, according to a Justice Department report that warns such problems could happen in other places roiled by mistrust between law enforcement and the community.
The report fleshes out a draft version made public in June, creating a portrait of poor community-police relations, ineffective communication among the more than 50 law enforcement agencies that responded, police orders that infringed on First Amendment rights, and military-style tactics that antagonized demonstrators.