The ACLU of Illinois Executive Director Colleen Connell wrote a letter to the editor of the Chicago Tribune addressing columnist Eric Posner's call for DNA testing of all arrestees. Connell points out that large numbers of arrestees are never prosecuted, and others are cleared of any wrongdoing. Moreover, she writes:
Recent studies demonstrate that the DNA collected in the national database already reveals predictive information about an individual's medical and mental health. Even if this personal information is revealed, Posner suggests, we need not worry since laws exist to "deter" government from sharing or selling this personal information to insurance companies and others who will have a significant interest in such data.
But the laws that prohibit such sharing of personal information can be lifted in short order, or done so retroactively.