In several cases across the country, criminal investigators have solicited voluntary DNA samples from large numbers of people in an attempt to get a match to DNA collected from a crime scene. The process has had limited success, but civil liberties advocates say t's a violation of Constitutional rights. A panel talks about the benefits and drawbacks of the so-called "DNA dragnet."
chief of the Prince George's County Police Department
National Commission on the Future of DNA Evidence
associate director of the American Civil Liberties Union