But the officials said the effort might exceed the capacity of their DNA laboratory, the largest in the country.

F.B.I. officials say its DNA laboratory handled 850 cases in its first year of existence.

In 2006, the DNA laboratory used so extensively after the World Trade Center disaster will move into a new 17-story, $247 million building.

Mayor Rudolph W. Giuliani wants to build a new DNA laboratory.

But on Wednesday, Mr. Fusco said the city was ready to build the world's largest DNA laboratory.

A judge agreed to send the victim's sweat pants to Lifecodes, a DNA laboratory, now defunct, for testing.

The sixth floor housed the DNA laboratory.

The other DNA laboratory, almost a duplicate, is in the bureau's training complex at Quantico, Va.

I immediately brought the hairs to a DNA laboratory.

But the work also continues in the medical examiner's DNA laboratory.