That there slippery slope.
They'll let them use your family's data too in case you're a criminal
https://www.slashgear.com/family-tree-dna-opens-its-genealogy-database-to-fbi-02564465/
Family Tree DNA opens its genealogy database to FBI
The FBI does not have open access to freely look through the genetic profiles in Family Tree’s library, like they can with public databases. Instead, the private company will allow them to create accounts like any other user, which means they are limited to submitting a DNA profile in order to search for a match. The company’s terms of service were updated in December, giving the FBI permission to use the database for cases involving “violent crime,” like murder or sexual assault, to either identify suspects or the remains of victims.
They'll let them use your family's data too in case you're a criminal
https://www.slashgear.com/family-tree-dna-opens-its-genealogy-database-to-fbi-02564465/
Family Tree DNA opens its genealogy database to FBI
The FBI does not have open access to freely look through the genetic profiles in Family Tree’s library, like they can with public databases. Instead, the private company will allow them to create accounts like any other user, which means they are limited to submitting a DNA profile in order to search for a match. The company’s terms of service were updated in December, giving the FBI permission to use the database for cases involving “violent crime,” like murder or sexual assault, to either identify suspects or the remains of victims.