DNA identification methods are such an established part of our law enforcement and criminal justice systems it is hard to believe that the technologies were developed as recently as the mid-1980s, and that the databases of law enforcement profiles were established in the 1990s. Although the first databases were limited to the DNA profiles of convicted rapists and murderers, the success of these databases in solving violent crimes provided the impetus for Congress and state legislatures to expand the scope of (...) the databases with little critical examination of each expansion's value to law enforcement or cost to privacy and civil liberties.We are now entering a new stage of DNA forensics, in which successive database expansions over the last decade have raised the possibility of creating a population-wide repository. In addition, new applications of DNA profiling, including familial and low stringency searches, have been added to DNA dragnets, the use of medical samples for forensic analysis, and other measures to create a series of crucial, yet largely unexplored, second-generation legal and policy issues. (shrink)