Gray, 25, died April 19 after suffering a severe spinal cord injury in police custody.
His death led to days of protests. A confrontation between students and police last Monday in Mondawmin erupted into violence; crowds through rocks at police, looted businesses and set fires.
Some 200 businesses were damaged. Police said Monday they had made 486 arrests linked to the unrest.
On Friday, Baltimore's top prosecutor announced charges against all six police officers involved with Gray's arrest.
The move eased tensions and led to celebratory rallies in the city, but arrests continued as people broke a citywide curfew. The curfew required all city residents to stay indoors between 10 p.m. and 5 a.m.