Long-hidden family scandal in the Jamestown colony in the U.S. revealed 400 years later by ancient DNA.
From CNN: "The findings demonstrate how genetic data in combination with other historical evidence 'can help bring to light narratives that were forbidden or shameful in the past,' said Dr. Christine Lee, an assistant professor of anthropology at the University of Mississippi."
Here's the original study in Antiquity journal: https://www.cambridge.org/core/journals/antiquity/article/historical-and-archaeogenomic-identification-of-highstatus-englishmen-at-jamestown-virginia/E04D83E224FA5C15B5CC08D0703FE9B0