[0374-2222] THE POLYGRAPH’S BIG LIE – Companion Dossier (PDF)

Description

In July 1921, inside a damp basement at the Berkeley Police Department, criminologist John Larson wired together a medical kymograph, an Erlanger blood pressure cuff, and a smoked-paper drum. He called it the cardio-pneumo-psychograph, but the world soon christened it the lie detector. What the headlines omitted—and what police blotters quietly suppressed—was Larson’s immediate realization that his brass-and-rubber contraption measured physiological panic, not moral veracity. The needle responded identically to terror, rage, startle reflexes, and guilt. Yet when suspects began confessing before the drum even spun, law enforcement and American intelligence realized the device’s true utility was theatrical coercion. This declassified companion dossier delivers a comprehensive forensic audit of the century-long deception. Featuring primary interrogation transcripts, technical diagrams of early analog polygraphs, and archival case analyses from Berkeley to Langley, this document charts how an acknowledged scientific failure became an untouchable interrogation ritual. Complete with chronologies, technical notes, and declassified memoranda, this investigative brief exposes the bureaucratic machine that traded empirical reality for an ironclad confession engine.