Food for thought, they found the Golden State Killer using the DNA of a third cousin. So in a familial pool of hundreds of people, if even 1 gives up DNA then you could (with effort) find out anyone else. Provided they're in a good spot on the tree, you can't do much with a 5th cousin.
Of course the Golden State Killer was extenuating circumstances. He killed about a dozen people and sexually assaulted over 50 women in the 70s. But, it makes you wonder about the future of criminology.
Of course the Golden State Killer was extenuating circumstances. He killed about a dozen people and sexually assaulted over 50 women in the 70s. But, it makes you wonder about the future of criminology.