First-order effects

• From Nov. 1, federal law enforcement can only use genealogy DNA databases for serious crimes under a written interim policy, replacing case-by-case discretion with formal limits on which investigations qualify.
• FamilyTreeDNA's FBI arrangement — the trigger for its user opt-out feature earlier that year — now operates inside explicit DoJ boundaries rather than an informal partnership.

Second-order effects

• Consumer testing firms gain cover to harden their own policies: what began as FamilyTreeDNA's opt-out becomes easier to standardize across the industry once the government itself concedes limits are needed.
• Companies outside the policy's scope — private databases and foreign services — become more attractive workarounds for investigators, shifting where forensic genealogy actually happens.

Third-order effects

• Voluntary pledges giving way to binding federal rules points toward genomic privacy becoming regulated infrastructure — a trajectory the Biden administration later extended by proposing restrictions on transferring Americans' biometric and genomic data to adversarial nations.
• If the serious-crimes threshold holds, expect pressure to codify the interim policy into permanent regulation covering state and local agencies, not just federal investigators.