Matthew Harrison Nelson, 25, of Tucson, AZ passed away on Sunday, April 2, 2006. Matt attended Plattsburg High School in Plattsburg, MO through 1997, when he moved to Tucson. While in high school he competed in baseball and Science Olympiad. In 1996 he competed in the National Science Olympiad in Atlanta, GA. He attended the University of Arizona and graduated in December 2005 with a degree in Bachelor of Science in Natural Resources. Matt is survived by his father and step-mother, Harrison and Julie Nelson of Tucson, his mother and step-father, Mary Alice and Larry Roberts of Plattsburg, MO and his brother, Zachary, also of Plattsburg. He is also survived by his aunt, Mary Jill and Uncle Steve Webber; Cousins, Heidi and Chase Webber; Uncles John Nelson and John Ditto, all of Missouri. Matt is now additionally survived by his niece, Lilly Mae Nelson.