BALTIMORE, MD - APRIL 30:  Riot police advance on protesters and media during protests in the Sandtown neighborhood where Freddie Gray was arrested on April 30, 2015 in Baltimore, Maryland. Gray, 25, was arrested for possessing a switch blade knife April 12 outside the Gilmor Houses housing project on Baltimore's west side. According to his attorney, Gray died a week later in the hospital from a severe spinal cord injury he received while in police custody.  (Photo by Andrew Burton/Getty Images)