From Okanagan Broadcasters:
The wreckage of a possibly decades-old airplane crash discovered on a mountain near Harrison Lake very likely contains the remains of CBC, CJOR and CKNW Vancouver radio personality Fred McDowell who also worked at CKOK Penticton in 1950. The light plane, piloted by Walter Dalton, disappeared on a flight from Penticton to Vancouver on April 24, 1957. Eric Welsh, The Chilliwack Progress.
https://www.theprogress.com/news/wrecka ... Kb9aCvymHk
I hope that it helps gives his family some closure to have this mystery solved at last.