On the evening of October 2, 2000, 50-year-old lawyer Marilyn Zaitzeff left her family cottage on Lambert Island, Ontario, and rode her personal watercraft onto Lake Superior. She was last seen at about 9:00 p.m. wearing a brightly coloured synthetic bathing suit; she frequently took her Sea-Doo out, sometimes at night. When she did not return after two hours her husband called 911 and a search began.

The next day the Sea-Doo was found overturned about a kilometre from the island and not far from shore. The Ontario Provincial Police reported the watercraft was mechanically sound, undamaged, and still had fuel in the tank. Despite extensive searches, Marilyn was never located. Authorities have described the circumstances as suspicious but have found no evidence of foul play and the investigation remains an open missing person case. Without recovery of her body, drowning is presumed rather than confirmed.

Did anyone on Lambert Island or who spent time on Lake Superior that October night see Marilyn or her Sea-Doo after 9:00 p.m.?