I haven't seen David for many years so I Googled his name. He passed away a couple of years ago. I found this obituary.
Mark Gerber
Fort Collins
Obituary for David William Brock
David Brock, 82, of Fort Collins, passed away at home August 14, 2018 after 9 ½ years with pancreatic cancer.
David was born in St. Johnsbury, Vermont to William and Waver Brock. He graduated high school there and went on to Boston University and earned a degree in Aeronautical Engineering. On June 27, 1964, he married his wife, Arlene.
Survivors include his wife; son Greg of Fort Collins, and daughter Sarah (and husband Steve) of Michigan; three grandchildren, Mona, Kirk, and Maria Leach; and three great-grandchildren. He was preceded in death by his parents.
He was a veteran with the National Guard, and loved volunteering at the Senior Center and the Colorado Welcome Center. David had many hobbies, loved his trains, airplanes, and cars. He even got his pilot’s license before his driver’s license! He was a great skier and racer starting at 6 years old.
David will be greatly missed. A Celebration of Life will be held at a later date.