Who do you think you are? What DNA tests reveal—and what they don't
Why it matters: A small group of consumer DNA test participants has created a de facto national DNA database, making nearly everyone traceable by law enforcement.
- The Golden State Killer case was the first high-profile crime solved using consumer genetic testing, identifying Joseph James DeAngelo Jr. through a distant relative's DNA on the GEDmatch database.
- Companies like 23andMe and AncestryDNA allow millions to explore ancestry, health risks, and find relatives, often revealing complex and sometimes shattering truths about family and identity.
- USC Dornsife geneticist Michael "Doc" Edge highlights that while all humans are related, the rapid proliferation of genetic data has created a privacy minefield, as a small percentage of participants can make virtually everyone traceable to law enforcement.
- Americans have historically opposed a national DNA database, yet consumer genetics has inadvertently created something similar, with only about 7% of the population needing to participate for nearly everyone to be findable.
Consumer DNA tests, initially used for ancestry and health, have become a powerful tool for law enforcement, as demonstrated by the Golden State Killer case, but this widespread data collection also raises significant privacy concerns about who controls our genetic information. While these tests can reveal surprising family connections and reshape personal identity, they also create a de facto national DNA database, making nearly everyone traceable even if they haven't submitted their own DNA.
