David W. Thornton was born February 11, 1952 at Wagner, SD to Wesley and Marie (Rysavy) Thornton. He grew up attending school in Wagner and attended Anaconda Job Corp, for heavy equipment operation. He worked construction for numerous years as a foreman and operator of equipment. He recently was employed by Trail King Industry in Mitchell. He was an avid outdoorsman, loving to fish and hunt. He was a member of Holy Family Catholic Church.
He is survived by a special friend, Susie Graham, Mitchell; two daughters: Niki Rethke, Milbank; Jenny Hanten, Watertown, three grandchildren; one brother, James (Tammy) Thornton, Wagner; two sisters: Carol (Jerry Stucky) Thornton, Piedmont; Marge (Jeff) Flesner, Spearfish; his mother, Marie Thornton, Spearfish; an aunt, Irene Rysavy, Spearfish and numerous nieces and nephews.
He was preceded in death by his father.