What is touch DNA? Go inside the lab that cleared the Ramseys with CNN's Brian Todd

Brian Todd
CNN Correspondent

We tracked down the lab that handled the new kind of DNA evidence that exonerated John and Patsy Ramsey in the murder of their daughter 12 years ago, six-year-old beauty queen JonBenet.

We wanted to find out how this lab effectively ruled out the heart-breaking and unresolved accusations that these parents murdered their daughter.

The lab's run by Bode Technology, based in one of those unassuming office parks - this one in Lorton, Virginia.

When we got there, the photojournalists and I were required to have our own DNA swabbed… two mouth samples each. They say it’s policy, to make sure there’s no strange outside DNA they can’t identify in there.

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