If someone blood related enters such a program, certain dna markers get on file that could lead to you. In recent years that way many unidentified dead or serial killers got identified, because someone related made such a test and the fbi database started beeping for a partial match.
See article third paragraph
Not seeing how that answers either of my questions.
If someone blood related enters such a program, certain dna markers get on file that could lead to you. In recent years that way many unidentified dead or serial killers got identified, because someone related made such a test and the fbi database started beeping for a partial match.