Two Vietnamese visitors disappeared from Banff, Alberta, during an organized tour in early June 2012. The two men, identified in public material as Nguyen Duc Bihn Dao and Duc Thuan Dao, were staying at the Banff International Hotel and failed to board their scheduled tour bus; the tour operator contacted Banff RCMP when they did not appear. Records disagree about ages and exact dates: one account lists Nguyen as 50 and last seen June 3, 2012, while RCMP-derived material describes a 50-year-old and a 19-year-old (father and son) who disappeared around June 2 and were reported June 4. An unusual detail is that investigators found no personal belongings left in the hotel room, yet there is no public documentation explaining where the men intended to go or how they might have traveled away from Banff. The pair also failed to board their booked flight home to Vietnam, and authorities did not establish that they returned there. Very little else is publicly recorded about their final movements or any evidence describing what happened to them.

Did anyone in Banff in early June 2012 see either man or have information about their movements after they left the hotel?