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Chicago police are searching for a black man who punched an unsuspecting white man outside of a building in the Loop late last month in an attack that was caught on camera.
Footage released by the department Sunday shows a man cleaning a sidewalk outside of a building in the 100 block of West Jackson Boulevard on July 23 when another man begins to walk past him.
In the video, the man then abruptly moves toward the worker, punching him in the face before fleeing the scene.