On Halloween night, as children were just beginning to wander neighborhood streets in search of treats, a handful of people crowded into a small conference room at the south DeKalb County offices of the Davis Bozeman Law Firm. Notebooks handy, the assemblage intently studied a series of jittery images flashing across a flat-screen television: dozens of uniformed police officers in riot gear joking and jostling as they fall into a loose column and begin moving under bright lights through the barricades they had erected earlier in the day to corral protesters.

“That’s the 11th Circuit building,” said one viewer, identifying the staging ground for the police sweep of the Occupy Atlanta encampment in Woodruff Park last fall. Slowly, the column of officers wends its way beneath glaring lights and into the park to a muddled soundtrack of shouts, drumming and the beat of helicopter blades.