409: John Kingston - Soldier of Fortune Murder-for-Hire Conspiracy Case
Aug 26, 2026 - 01:23:07
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407: Barry Colvert – John Walker Spy Ring Case, Early Days of FBI Polygraphs
R etired agent and veteran polygraph examiner Barry Colvert reviews the over 20 polygraph exams he conducted on the John Walker spy ring case, beginning with Barbara Walker, John's ex-wife who was almost dismissed as a d...
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