Douglas L. Sullivan, 52, Yankton, died Friday, Feb. 6, 2009, at South Dakota Human Services Center, Yankton.
Private family memorial services will be at a later date. His body will be donated to the Sanford USD Medical School.
Hansen Funeral Home, Vermillion, is handling arrangements.
He was born on June 24, 1956, in Mitchell to Wilfred and Leona (Hoffman) Sullivan.
He grew up and attended school in the Fulton area.
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He had been institutionalized most of his life.
He is survived by three brothers: Gary, Ankeny, Iowa; Randy and wife Sandie, Vermillion; and Kevin and wife Maria, South Sioux City, Neb.; six sisters: Carolyn Reiling and husband Calvin, Lisbon, Iowa; Jacqueline Behounek and husband Bernard, Altoona, Wis.; Theresa Presto and husband David, Eldridge, Iowa; Helen Brown, Sioux Falls; Valerie Sullivan, Sioux City, Iowa; and Laurie Yip and husband David, Benicia, Calif.; and numerous nieces and nephews.