CHICAGO – A Chicago police officer is facing charges after fatally hitting a pedestrian with her car in River North while off duty last month. At around 12:30 a.m. on Dec. 7, 40-year-old Tangie Brown was allegedly driving a white SUV when she lost control of the vehicle, jumped a curb and struck a 56-year-old woman on the sidewalk in the 300 block of North State Street.