The Problems With Facebook’s Polarization Study

The U.S. Justice Department on Friday announced a federal civil rights investigation into the legality of the Baltimore's police department's use of force and whether there are "systemic violations" as well as any pattern of discriminatory policing.

The announcement came less than one month after the death of Freddie Gray, a 25-year-old black man injured in police custody, sparked outrage in Maryland's largest city, although the department's wider investigation is not specifically tied to his individual case.

A Justice Department statement sa