'Cities from New Orleans and Seattle to Missoula, Mont., and East Haven, Conn., are grappling with...federally mandated changes after investigations into their police departments. In Miami, the Justice Department found a pattern of the use of excessive force—in an eight-month period in 2011, eight young black men were shot and killed by the police. This month, the Justice Department announced a sweeping settlement forcing Puerto Rico to change 11 areas of policing, including the use of excessive force, searches, stops and the handling of domestic violence...Civil rights lawyers and criminal justice experts have hailed the Justice Department’s increased activism.”