MADISON, Wis. — A judge has sentenced a California woman to three years in prison for shipping methamphetamine to the Red Cliff Band of Lake Superior Chippewa's reservation in northern Wisconsin.

Sixty-nine-year-old Rita Witter of Fremont, California, pleaded guilty in January to one count of distribute narcotics. U.S. District Judge William Conley in Madison handed down her sentence Thursday. Prosecutors announced the sentencing Monday.

According to prosecutors, Witter shipped four or five packages containing methamphetamine to the reservation.

Three other people, including Witter's son, Ryan, have been charged for their roles in prosecutors called a distribution conspiracy that lasted a year. All of them have pleaded guilty.