(18. April 2009)

The F.B.I., with a DNA database of 6.7 million profiles, expects to accelerate its growth rate from 80,000 new entries a year to 1.2 million by 2012 — a 15-fold increase. F.B.I. officials say they expect DNA processing backlogs — which now stand at more than 500,000 cases — to increase.

Law enforcement officials say that expanding the DNA databanks to include legally innocent people will help solve more violent crimes.