Lexington police arrested a woman accused of pulling a gun on another driver Sunday night. Police say a man was stopped at a stop sign along Alexandria Drive when the driver in front of him flagged him down. The man told police that when he got out and approached, the woman pulled a gun on him.Officers say they tracked down the woman by her license plate number and arrested her at her home. Thirty-six year old Natasha Horton was charged with wanton endangerment.