BALTIMORE, MD - APRIL 22: Ten-year-old Robert Dunn uses a megaphone to address hundreds of demonstrators during a protest against police brutality and the death of Freddie Gray outside the Baltimore Police Western District station April 22, 2015 in Baltimore, Maryland. Gray, 25, was arrested for possessing a switch blade knife April 12 outside the Gilmor Homes 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 Chip Somodevilla/Getty Images)