The FBI has identified the infamous 'Zodiac Killer' who killed at least five people in the 1960s as an airforce veteran, a cold case investigator has claimed.
The theory has been put forward by journalist Thomas Colbert, who has said a Bureau whistleblower confirmed to him the chief suspect was Air Force veteran Gary Francis Poste.
Poste, who died in 2018, was connected to the case by a 'partial' DNA sample, Mr Colbert claims.
