A Sikeston woman is in Scott County Jail, charged with drug trafficking.  City detectives received a drug tip Tuesday after activity near Alabama Street and Compress Road.  The investigators responded and made contact with a subject sitting in a parked vehicle.  The female occupant was shoving a small plastic baggy down her pants as they arrived.  A pat down revealed just over an ounce of crack and a small amount of marijuana.  30-year-old Christen Williams was arrested, charged with felony drug trafficking and misdemeanor for possession of marijuana.  She remains jailed on a 100-thousand-dollar bond.