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General => Ancestral Family Tree DNA Testing => Topic started by: Erato on Friday 12 October 18 05:32 BST (UK)
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Most People of European Ancestry Can Be Identified From a Relative’s DNA
"Yaniv Erlich, a computational biologist, was working to understand the reach of such police searches. Were they lucky breaks? Or could nearly every American be found through a third cousin’s DNA? ... These cases are not exceptional, according to his analysis, now published in Science. Golden State Killer investigators found their suspect through third- and fourth-cousin matches in a database called GEDmatch, which includes information from about 1 million people. In a database of that size, Erlich and his co-authors show, nearly 60 percent of people have a relative who is a third cousin or closer."
https://www.theatlantic.com/science/archive/2018/10/golden-state-killer-genealogy/572545/