That's how they caught the golden state serial killer https://www.cbc.ca/news/world/dna-from-genealogy-site-used-to-catch-suspected-golden-state-killer-1.46377

That's how they caught the golden state serial killer https://www.cbc.ca/news/world/dna-from-genealogy-site-used-to-catch-suspected-golden-state-killer-1.4637726#:~:text=World-,DNA%20from%20genealogy%20site%20used%20to%20catch%20suspected%20Golden%20State,to%20find%20a%20DNA%20match https://www.cbc.ca/news/world/dna-from-genealogy-site-used-t.... Also, the government keeps all DNA from people arrested (not convicted) for anything https://www.nbcnews.com/news/world/your-dna-police-database-flna6c10617124 https://www.nbcnews.com/news/world/your-dna-police-database-...