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Police later recovered the men's boat from Lake Huron, but the bodies of Neil Wormsbecker, 29, and Hank Englebertus Halff, 30, have never been found.

"They were observed south of Goderich by other boaters. There was a storm coming in," Huron County OPP Const. Craig Soldan said of the last reported sighting of the pair on Oct. 22, 1967. "In the following days of the disappearance, their vessel was located."

Now, police are hoping advances in DNA technology will help them close the case nearly six decades later.

But investigators haven't been able to track down any relatives of the missing boaters, both Stratford residents, and are making a public appeal for them to come forward.

"We've tried to contact the next-of-kin from both of these individuals that we had on file. We can't find any information on them," Soldan said, adding police efforts to search social media and open-source intelligence came up empty. "And to be honest, we don't even know if they're still alive."