QUINCY (CBS) A Dorchester woman is facing charges after police say she pretended to be a police officer and tased a man in a road rage incident.Quincy police received a report Wednesday night from a man and his girlfriend saying Shunae Allen, 35, was riding their bumper and honking her horn while frantically flashing her lights. Allen allegedly followed the couple as they pulled over into a Roche Brothers parking lot.Witnesses told police they saw Allen and the man arguing.