Sander Lingman vanished while staking claims in the remote Gripp Lake area of northern Ontario in early November 1960. He was last seen about 69 kilometres northwest of Nakina; the prevailing explanation has been that he became disoriented and lost in the dense, rugged wilderness that surrounds the area. Intensive searches at the time found no trace of him and the file went cold.

Author Tim Marczenko later featured Lingman’s disappearance in his book Gone Cold, which prompted renewed attention. Police have reviewed the file multiple times, familial DNA has been collected, and the case was brought before an adjudication judge for review. The official theory remains that he was a prospector who lost his way, but no physical evidence has ever been recovered.

If anyone knew Sander, worked in the Nakina or Gripp Lake area, or has information that could help clarify what happened that November day, please share what is known.