A judge’s order that the dashboard video of Chicago Police Department officer Jason Van Dyke shooting to death 17-year old Laquan McDonald has set off an avalanche of developments that continue to unfold. On Monday U.S. Attorney Loretta Lynch announced the U.S. Department of Justice is opening a probe into the pattern and practices of the Chicago Police Department. That probe had been called for by Illinois Attorney General Lisa Madigan, and supported by demonstrators and many politicians locally and nationally. At first Mayor Rahm Emanuel appointed his own panel of Chicago lawyers, said he opposed the idea of a Justice Department investigation. Quickly he changed course and said he supported the investigation.