This development of using ancestral DNA to find relatives of a suspect is fascinating and dates back only to 2018. I want to understand how it works in more detail. When they find the relatives which are more often cousins or distant cousins, I believe they search for last names and regions of the country. This is how to capture a criminal who's DNA is found at the crime scene but who is not in the police DNA database. It was used in CA to find the "Golden State Killer" in 2018.
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