David Bielefeld, 75 passed away on March 7th, 2020 with his family by his side at Mount View Care Center in Schofield, WI.   David was born on June 8th, 1945 in Warrensburg, Missouri to Robert and Dorothy Bielefeld. He was their only child; well-behaved, but got into his fair share of mischief.   David grew up captivated by TV shows about cowboys and space exploration. His childhood curiosity turned into a lifelong love of research and medicine. He earned his PhD in Physiology from University of Alabama, and published many medical research papers on diabetes. He would go on to teach the subject at Saba University School of Medicine, and earn his MD there.  In 1983, David began writing to the woman who would later become his wife, Hsiu-yeh (Tina). The two exchanged letters as part of an international pen pal program to improve Tina's English. This relationship quickly blossomed into romance, and the two were married on September 1st, 1985.  David was a devoted, loving father. He would do anything for his children. He stayed up late at night to help with homework, dutifully attended sports competitions and concerts, and collected memorabilia of his children's most important moments.   He loved to take walks, play tennis, listen to mystery novels, and watch classic movies and television. He ate a peanut butter sandwich nearly every day, and made the best spaghetti. David was brilliant, well-spoken, supportive, and kind.  David is survived by his wife; 3 children, Jeffery Bielefeld of Forest Grove, OR, ShirMung Bielefeld of Brooklyn, NY, and ShirJia Bielefeld of Weston, WI; 2 grandchildren, Kristopher and Elliot Bielefeld of Forest Grove, OR. David was preceded in death by his parents.