The researchers, Dr. Hamer said, identified 182 families, but only obtained DNA from 48.

Now, researchers have obtained DNA from some of London's plague victims and confirmed that Y. pestis appears to be to blame.

Mr. Clarke, how do you obtain DNA from a crime scene?

In this case, obtaining DNA from the mother would be easy, but nobody knew if Johnnie's dad was even still alive, much less where he was.

Check- ing his theory meant obtaining DNA, blood, and tissue samples from the vic- tims' surviving relatives.

Biela's girlfriend was also questioned and gave police permission to obtain DNA from her four-year old son, whom Biela had fathered.

He collected dishes, silverware, glasses, and pizza crusts to obtain DNA.

She also claimed that Brown's legs had been sawn off after his death in order to obtain DNA to prove her son's paternity.

At least as far as he could tell, no one had ever tried to obtain DNA from an ancient corpse.

Based almost entirely on tips to the task force, the authorities have swabbed the mouths of 800 men to obtain DNA.