Willie Mathews Jr., 21, of Matteson, Illinois, is facing felony charges including false personation of a police officer with a weapon.

Chicago police officers pin a demonstrator to the ground and arrest them at West Washington Street and North State Street during a protest in the Loop, decrying increased immigration enforcement across the country, Tuesday, June 10, 2025.

The sounds of one of Chicago’s largest protests in recent memory reverberated throughout downtown Saturday, as tens of thousands gathered in a united admonishment of President Trump.

Chicago is an anchor city for the "No Kings" protests Saturday, and city officials said they are prepared for the crowds expected.