It should be completely different databases. There was an episode of that hateful, vile shit that is L&O:SVU where a victim's DNA was entered in the criminal database and they matched it to another crime. It's been a few years since I saw it because the show was watchable at the time and hasn't been in nearly 15 years. IIRC, they tossed it because it violated procedure and had to make a charge around if they had been able to connect the victim and perp in the old case.
It should be completely different databases. There was an episode of that hateful, vile shit that is L&O:SVU where a victim's DNA was entered in the criminal database and they matched it to another crime. It's been a few years since I saw it because the show was watchable at the time and hasn't been in nearly 15 years. IIRC, they tossed it because it violated procedure and had to make a charge around if they had been able to connect the victim and perp in the old case.