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National Geographic ChannelNat Geo Wild
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  • THE BTK KILLER

ABOUT THE SHOW

In one of the most significant CSI developments of the 20th Century, British investigators caught and convicted a murderer using DNA screening for the first time. 

Colin Pitchfork raped and murdered 15-year old Leicestershire schoolgirls Lynda Mann in 1983 and Dawn Ashworth in 1986. 

Find out how similar DNA techniques helped close a notorious Kansas cold case 20 years later, as the sadistic ‘Bind, Torture, Kill’ murderer Dennis Rader was finally brought to justice.

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