Clifton Coetzee is one of SA’s leading authorities in the science of forensic psychophysiology having a career spanning over 30 years. Clifton is a manufacturer accredited polygraph Instructor and the developer of AVSAPRO, the only automated, digital voice polygraph system worldwide. Cliff has investigated fraud and deception in all it’s forms for over twenty five years practising and instructing polygraphy, voice-stress analysis, statement veracity analysis and forensic interviewing techniques.

Clifton’s first manual for forensic psychophysiologists and certified fraud examiners was catalogued by the FBI training academy in 2000.

His investigations included large scale bank and insurance fraud, usually committed by employees. Cliff received his training from former US and Israeli police and intelligence experts and has worked on behalf of listed IT logistics companies based in the UK, USA, Spain, Lebanon and Australia. He has also studied the work of many early experts in the  field of statement analysis, the different techniques, applications, differing schools of thought; such as Statement Veracity Analysis, Credibility Based Content Analysis, Statement Content Analysis (SCAN) and Scientific Analysis as taught by Avi Sapir of the Laboratory for Scientific Interrogation Inc, Arizona, under the acronym ScAN.