What is also worrisome about the potential uses of DNA data is that “it doesn’t have to be your own” to help establish links, said Field. “If a cousin of yours decides to donate DNA information, it’s out there,” he added. “There’s nothing you can do about it. You can’t prevent your cousin from doing that, and you probably don’t even know [about] it. That’s a really tough one for the law to address.” Up until now, the assumption was that an individual would have the autonomy to decide who could see his or her genetic information, but that is no longer the case, he noted.