Others see expanding DNA databases to include samples from those who have not been convicted as a potential crime-solving aid.
"I think there is a valid public policy for doing that because there are many people who have committed crimes but who have never been convicted but have been arrested and without their DNA in the system we are not solving those crimes," said Associate Attorney General Kevin O'Connor.
There are also other problems foreseen by critics of this proposal.
Justice Department officials estimate when the expansion is fully implemented -- as soon as December -- information from about 1.2 million people a year could be added to the national DNA database. It's another cause of consternation for critics--who say backlogs remain a major problem.
The FBI estimates that about a quarter of a million DNA samples have yet to be processed in its lab and says it did not receive any new funds to deal with the backlog, which is sure to grow even larger.