Randy R. Sitter, a 46-year-old professor of statistics and actuarial science at Simon Fraser University, disappeared after a kayaking trip in Chuckanut Bay, Washington on September 19, 2007. He left his home in British Columbia that morning for exercise and to work; he took a yellow inflatable kayak and had his laptop for university work. He never returned.

Searchers later found his yellow inflatable kayak on the shore of Lummi Island with a life jacket still attached and his keys and wallet in a pocket. A bag containing food and other personal items that he had taken with him was missing. Despite an extensive search, he was never located and is presumed to have been lost at sea in an accidental drowning.

Sitter was described as a leading statistician and a valued mentor, husband, and family man. Are there anyone who was in Chuckanut Bay or near Lummi Island on September 19, 2007, who might have seen him or his kayak?