Law enforcement investigators seek out private DNA databases
Sweden have a national DNA registry that, while optional, practical all newborns are added to since 1975. The registry is purely intended for medicine and research, and the few exceptions when law enforcement had requested a sample, there have been outcry from both researchers and the public that such use would start make parents denying the request and ruin the extremely valuable resource that such registry create. Everyone loose when that trust is lost, from the pain and misery that happens from untreated disease, to the economical loss to society, to the loss of progress from a lack of research data.