UPDATE: This post has been updated with additional information.
On Friday, January 20, thousands of protesters took to the streets of D.C. to disrupt Donald Trump’s inauguration festivities. A small fraction of them damaged property and threw projectiles at police in riot gear, who deployed flash-bang grenades, tear gas, and pepper spray on large crowds throughout the day. But according to CityLab’s observations of the demonstrations that morning, most of the roughly 230 people arrested—who included a number of legal observers, journalists, and medics—did not participate in such activities and were simply booked for being nearby.