Used correctly this would close a lot of cold cases.
https://www.thelondoneconomic.com/news/covid-testing-firm-selling-swabs-carrying-customers-dna-to-third-parties-301236/
https://www.foxnews.com/us/dna-leads-to-arrest-in-a-second-washington-state-cold-case-involving-a-murdered-young-girl