Nick Kostiuk was 64 when he was last seen on Lower Manitou Lake, Ontario, on August 23, 1983. Observers watched him get into a boat at a dock and leave the shore; he was not wearing a life jacket and could not swim. His wife was the last person to see him alive.

Search and rescue teams and the Dryden Ontario Provincial Police conducted an extensive search of the lake and surrounding wilderness, but no trace of Kostiuk or the boat was found. Investigators considered a drowning the most likely outcome given the circumstances, yet no definitive evidence was recovered and his status remains officially missing.

He was described as a Caucasian male, about 5 feet 10 inches tall, roughly 220 pounds, heavy build, fair complexion, with brown eyes and short wavy brown and white hair. Does anyone have memories of Lower Manitou Lake in August 1983 or information that could help clarify what happened that day?