The FBI is greatly expanding its DNA database.
The New York Times reports the agency is joining 15 states in collecting millions of new DNA samples.
So far, the FBI has only genetically tracked convicts.
But now, the agency will begin tracking detained immigrants and people awaiting trial.
The FBI hopes collecting the samples will help solve more crimes.
However, the practice raises privacy concerns for people who are presumed innocent until proven guilty.
The agency says it wants to grow their database from 80,000 new entries a year to more than 1 million a year by 2012.