Hydie, the only case I know of occurred last year. It had long been thought that the small boy buried at the expense of the crew of Mackay-Bennett was Gösta Pålsson. A team from Lakehead University in Ontario established that the victim was really Eino Vijami Panula. The full, rather gruesome, story is on this site if you search. There's also a special article you can get to via the home page.