ON 3/9/2019 AT APPROXIMATELY 12:58 A.M.,  A PLYMOUTH COUNTY SHERIFF'S DEPUTY WAS PATROLLING THE WALMART PARKING LOT IN LE MARS, IA.  THE DEPUTY OBSERVED A FEMALE PARTY IDENTIFIED AS ELIZABETH MARIE EHRIG, AGE 36 OF SIOUX CITY APPEARING TO BE UNDER THE INFLUENCE OF A CONTROLLED SUBSTANCE.  A CONTINUED INVESTIGATION LED TO EHRIG BEING FOUND TO BE IN POSSESSION OF A CONTROLLED SUBSTANCE (METHAMPHETAMINE) AND DRUG PARAPHERNALIA.  EHRIG WAS PLACED UNDER ARREST AND LATER BOOKED INTO THE PLYMOUTH COUNTY JAIL.