CHICAGO — Demonstrators took to the streets of this city’s downtown in tense but largely peaceful protests after the release of video on Tuesday showing the fatal shooting of a black teenager by a white Chicago police officer.

Into the early morning hours of Wednesday, protesters led clusters of police officers on a march through the streets of Chicago’s Loop, blocking intersections, chanting outside a police station and, along a major road to the city’s largest highways, unfurling a banner that cited deaths at the hands of the police.

The night of protest followed a day of fast-moving events: first-degree murder charges against the officer, Jason Van Dyke, in the shooting of Laquan McDonald, 17, and, hours later, the release of graphic video from a police dashboard camera of the 2014 shooting, which a judge had ordered the city to make public by Wednesday.