Attorney General Merrick Garland announces an investigation into the Minneapolis Police Department.

The Justice Department will investigate the policies and operations of the Minneapolis Police Department, Attorney General Merrick B. Garland announced on Wednesday, a day after the former officer Derek Chauvin was convicted of murder in the death of George Floyd in a rare rebuke of police violence.

“The Justice Department has opened a civil investigation to determine whether the Minneapolis Police Department engages in a pattern or practice of unconstitutional or unlawful policing,” Mr. Garland said in brief remarks at the Justice Department.

Such investigations are often the precursors to...