CHICAGO — Hundreds of protesters blocked store entrances and shut down traffic in Chicago’s ritziest shopping district on Black Friday to draw attention to the 2014 police killing of a black teenager who was shot 16 times by a white officer.

Demonstrators stood shoulder to shoulder in a cold drizzling rain to turn the traditional start of the holiday shopping season on Michigan Avenue’s Magnificent Mile into a high-profile platform from which to deliver their message: The killing of 17-year-old Laquan McDonald — captured on a squad-car video made public earlier this week — was another example of what they say is the systemic disregard police show for the lives and rights of black people.

They chanted “16 shots! 16 shots!” and stopped traffic for blocks to express their anger over the Oct. 20, 2014, shooting and the subsequent investigation, which they say was mishandled.

While shoppers continued to make their way along sidewalks and the empty street, some major retailers were forced to close, at least temporarily. Among them was the typically swamped Apple store, where dozens of employees in red shirts stood in an otherwise empty two-story space and watched through store windows as protesters linked arms to stop anyone from entering.

It was the largest demonstration in Chicago’s streets since police on Tuesday released the video under a court order to make it public.

The footage shows McDonald jogging down a street and then veering away from Officer Jason Van Dyke and another officer who emerge from a police SUV drawing their guns. Within seconds, Van Dyke begins firing. McDonald, who authorities allege was carrying a three-inch knife and was suspected of breaking into cars, spins around and falls to the pavement as Van Dyke keeps shooting.

Prosecutors charged Van Dyke with first-degree murder on Tuesday, hours before the video’s release.

Frank Chapman, 73, of Chicago, said the video confirms what activists have said for years about Chicago police brutality.

“That needs to end,” Chapman said. “Too many have already died.”

Chicago police blocked off roads to accommodate the march down Michigan Avenue, and officers in some areas formed a barrier of sorts between protesters and stores and helped shoppers get through the doors. But protesters succeeded in blocking main entrances on both sides of the street for more than three blocks.

When one person tried to get through the front door of Saks Fifth Avenue, protesters screamed at him, shouting, “Shut it down! Shut it down.” Entrances were also blocked at the Disney Store, the Apple Store, Nike, Tiffany & Co., and Neiman Marcus, among others.

Several protesters were seen lying face-down on the ground in handcuffs, but a police spokeswoman said she hadn’t been informed of any arrests.

Shoppers seemed to take the disturbance in stride, with some even snapping photos of the crowd.