(Sioux Falls, SD) — The mother charged in the 1981 death of her newborn son is set to change her plea. Theresa Bentaas is set to be in court today to change her not guilty plea. A sentencing hearing is scheduled for December 2nd. The murder case drew national attention when “Baby Andrew” was found wrapped in a blanket in a ditch along the current Sycamore Avenue in February 1981. Bentaas was identified as the baby’s mother through DNA evidence in 2019.