Peter “Pete” Otto Peterson, 74, of Mantorville, passed away surrounded by his family after a lengthy battle with cancer on Sunday, Aug. 18, 2019.Pete was born on Sept. 4, 1944 to Otto and Novia (Larson) Peterson in Fairmont, Minn. He graduated from Trimont High School in 1962 and then attended Gustavus Adolphus College, earning a B.S.