Donald Lee Mayer, 47, disappeared from south Lake Whatcom in Whatcom County on August 1, 1997. He was on a boat with two friends, a father and son, and wearing tan swim trunks when he jumped in to swim. Witnesses say he dove underwater twice and resurfaced, but after a third dive he did not come back to the surface.

Deputies from the Whatcom County Sheriff’s Office, Whatcom County Search and Rescue, a water rescue unit, the local fire department and a dive team conducted a large multi-agency search of the area where he was last seen but were unable to locate him. The circumstances of his disappearance remain unexplained.

Did anyone on Lake Whatcom that day see anything that could explain what happened to Donald, or does anyone have information about his last movements on the boat?