Late September 1960: five people left Nulato, Alaska, by boat for the village of Ruby and were never seen again. Among them was 48-year-old Leo Demoski, Jr., an American Indian/Alaska Native; the other missing were Bertha Demoski, 38, Claude Demoski, 45, Emmett Nollner, 28, and Harry Pitka, 39. The group was last seen on September 25, 1960, and the Alaska State Troopers were notified on September 26, 1960.

Their boat never arrived in Ruby and no trace of the boat or any of the five has ever been reported. The Yukon River route between Nulato and Ruby is remote and was described as difficult to navigate, but the specific circumstances of their disappearance are unknown. The case remains open and unresolved.

If anyone knew these individuals, their travels, or the river route in 1960, any information could help shed light on what happened to Leo Demoski, Jr. and the others.