Update (Sept. 9, 2021):  Nikkita Brown, a Black woman who was seen in a video in August being physically accosted by an officer at a Chicago park, is now speaking up about the incident.  Speaking to ABC News, Brown said she was walking her dog in the Lincoln Park neighborhood of Chicago when an officer drove up to her and told her to leave the closed area immediately. The officer, according to Brown, continued to follow her after she agreed to leave. A video taken by Brown, which captures part of the confrontation, also shows the officer telling the woman that she can go to jail. The policeman, who eventually got out of his car and followed the dog owner on foot, allegedly added that Brown would never see her pet again. The frightened park visitor said she tried to make a phone call while being followed, hoping that somebody would answer or at least listen to her voicemail and realize that she might be in jail or worse.  Footage of the incident also shows the officer arguing with...