The surprising DNA source that could identify rapists

December 17, 2014 3:15 PM

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The surprising DNA source that could identify rapists

Swabs from a DNA sample collection kit are shown at the Iowa Department of Correction's Residential Treatment Facility in Sioux City, Iowa, Tuesday, Nov. 5, 2013. (AP Photo/The Sioux City Journal, Tim Hynds)

Investigators routinely analyze pubic hairs found at crime scenes where rape is suspected, but it's rare that the hair has its root, and thus sufficient DNA to identify its former owner.

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