WaPo: A serial rapist eluded police for years. Then they searched a genealogy site. by Eli Rosenberg:
Like DeAngelo, Waller was arrested after police searched the genealogy site GEDmatch for leads. In DeAngelo’s case, officials did what’s called a familial DNA search of GEDmatch, in which they sought to find someone who was closely genetically related to him, and worked backward to find a suspect. Familial DNA searching, particularly as it relates to government-run DNA databases, has come into wider use around the country, but it raises complicated questions about whether it means that the privacy rights of people are forfeited, in effect, by the decisions made by their relatives.