National Geographic Documentaries Season 2012 Episode 18 The BTK Killer
- June 4, 2012
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.
