Death notice in the Manning Monitor: David Edgerton died August 14, 2008 - he was 53.

From the Brooks Funeral home in Clive, Iowa (web page archives): David Edgerton, 53, died August 14, 2008. He attended ISU, was in the Peace Corps, was an inventor in various businesses, and a member of the Hunt Masters. His wishes were to be cremated.

Historical notes: David was the son of Dr. John and Darlene Jean "Shoney" (Adams). Dave had two brothers, Michael, also deceased, and John Edgerton, Jr.
Michael graduated from Manning High School in 1967 and David in 1973.