Bobby Lee Banks has pleaded guilty to first-degree murder related to the 1989 death of Kelle Ann Workman in Wright County court.
As part of a plea deal, charges of first-degree kidnapping and forcible rape were dismissed.
He is scheduled for sentencing in February 2026.
His brother, Leonard Banks, received a 15-year sentence after pleading guilty to voluntary manslaughter.
Kelle Ann Workman was reported missing while mowing a cemetery in Douglas County.
