Tyshawn Lee and Laquan McDonald

He didn’t give details. It shows McDonald jogging down a street and then veering away from Van Dyke and another officer who emerge from a police SUV drawing their guns. You know, it’s Thanksgiving and you’re going to call and try to get people to come out and help support your cause.

After protesters began blocking other stores along Michigan Avenue, the front revolving doors at Water Tower Place were locked.

Store employees were directing shoppers to exit from side doors. “People have a right to be angry, people have a right to protest”. Anita Alvarez said she “moved up” her decision to charge Van Dyke after a judge ruled last week that the video should be released to the public.

Jackson spoke the a day after about 2,000 protesters flooded Chicago’s Magnificent Mile, a strip of designer stores, to voice outrage over the killing and how the case was handled. All previous marches have been largely peaceful.

The group carried the coffin around City Hall and the Cook County Building, trailed by media with about six video cameras, a few still cameras and a boom microphone on a giant pole, hanging down over the crowd. “Shut this down! Shut this down!” It was the police who maintained a code of silence despite at least seven other officers who witnessed the shooting at close range. The officers are not responding.

Demonstrators chanted “Stop the cover-up!” and “16 shots!”

The spread of similar videos has sparked large-scale protests in some cities. Lee, nine years old, was lured into an alley by gang members and killed, reportedly because his father was a member of a rival gang. Shut it down! She said she was representing her family, including her three grandchildren.

The Rev. Michael Pfleger, a Roman Catholic priest and prominent local activist, said he thought Friday’s protest would cost businesses money because the publicity surrounding it would discourage shoppers from even venturing into the area.

“We need bold comprehensive change in the police department and the criminal justice system”, Jackson said during a news conference at his Rainbow PUSH headquarters.

Several hundred demonstrators have gathered in the drizzling rain, many with umbrellas and plastic-wrapped signs.

The video has drawn nationwide attention to the 17-year-old’s October 2014 death, and the march Friday along the Magnificent Mile on a cold, wet day was the most prominent demonstration by those critical of the incident and Mayor Rahm Emanuel’s response to it.

Frank Chapman of the Chicago Alliance Against Racist and Political Repression was one of the leaders of the march. The Chicago police had been hiding the video for a year before it was discovered.

For months, Chicago leaders had feared that the release of the video could provoke the kind of turmoil that rocked cities such as Baltimore and Ferguson, Missouri, after young black men were slain by police or died in police custody.

Police kept a distance from the protesters and blocked traffic from entering onto Michigan Avenue.

Some 20 million people visit each year. Protesters also spilled over onto southbound Michigan Avenue, and traffic was eventually stopped in that direction north of the river as well. Some people were angry that they got a phone call urging them to join Friday’s protest.

The protesters chanted “16 shots, 14 months” which was in reference to the number of bullets that were fired at the victim, Laquan McDonald, as well as the number of months it took for the video to surface and the pursuit of charges against the suspect – Chicago officer Jason Van Dyke, NPR reported.