Marilyn Grace is certain that William Henry Long, who died in Utah in 1936, was actually the famous outlaw Harry Alonzo Longabaugh.
"We found the real Sundance Kid,” said Grace, a documentary filmmaker in St. George, Utah.
Grace said a DNA sample from an apparent relative of Longabaugh will be compared to DNA from Long’s remains, which had been exhumed for the purpose.
She said the "definitive” evidence so far consists of photographic comparisons by John McCullough, University of Utah anthropologist, who concluded there was a 99 percent chance the photos of Longabaugh and Long were of the same person. If the DNA is not a match, Grace said, it might be because the living donor is not really a Longabaugh descendant, Grace said. If it’s positive, it proves Long was the Kid.
"Either way, we win,” she said. [Link]