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The End of the Polygraph: Computer Voice Stress Analyzer Emerges as

Superior Deception Detection Tool

LEWES, Del., March 4, 2014 /PRNewswire/ -- According to the National

Association of Computer Voice Stress Analysts (NACVSA), the

polygraph's 60 years of dominance as the primary investigative tool to

detect deception is drawing to a close. This is based largely on the

recent publication of a peer-reviewed study by renowned criminologist,

Professor James Chapman, in the scientific journal "Criminalistics and

Court Expertise" which validated the accuracy of the Computer Voice

Stress Analyzer@ (CVSA) to be greater than 95%. Currently only those

aligned with the US federal polygraph community and a dwindling number

of private investigators continue to use the antiquated polygraph


In his explosive book The Clapper Memo, investigative journalist Bob

McCarty documents the extensive lengths to which the Department of

Defense Polygraph Institute (now called the Credibility Assessment

Institute) has gone to discredit the more accurate and less expensive

CVSA. McCarty has written extensively on the topic of polygraph and

vetting failures leading to preventable "insider attacks" against US

military members by Afghani nationals.

One of the more than 2,000 agencies that have made the switch to the

CVSA is the Citrus County Sheriff's Office, Florida. In the very

first days of the Jessica Lunsford abduction and murder case,

Jessica's father became a suspect. According to retired Citrus County

Sheriff's Lt. David Wyllie, then the head of the Special Victims Unit,

he requested Jessica's father take a CVSA examination shortly after

her disappearance. Jessica's father agreed, and the CVSA cleared him

as a suspect. However, investigators from the Florida Department of

Law Enforcement (FDLE), a polygraph hold-out organization, decided to

conduct a polygraph of the father. The FDLE polygraph results

directly contradicted the CVSA results and showed Jessica's father to

be "Deceptive" regarding the same issues for which the CVSA

examination had cleared him.

FBI investigators on the Jessica Lunsford Task Force then requested

the father be tested AGAIN by an FBI polygraph examiner. Jessica's

father agreed and took an FBI administered polygraph, which was

determined to be "Inconclusive" - meaning the polygraph examination

was of no investigative value.

Based on the conflicting results between the CVSA and the polygraph

examinations, Jessica's father was considered 'a person of interest'

until the killer, John Couey, was caught and confessed to Jessica's

abduction and brutal murder. In the end, the CVSA results were correct

and both the FDLE and FBI polygraph tests were wrong. This is one of

many such cases where the CVSA proved its accuracy over the old

polygraph. Fortunately, the error-prone polygraph has recently come

under intense scrutiny after US whistleblower Edward Snowden passed

multiple polygraphs before defecting from the US with a treasure trove

of top secret documents. Many in the federal government have stated

the Snowden case is the beginning of the end of the federal polygraph


With major US law enforcement agencies such as those in Atlanta, New

Orleans, Nashville, Baltimore, Miami, the California Highway Patrol,

as well as the US Federal Courts now depending upon the CVSA as an

investigative tool for both criminal cases and to screen police

applicants, it appears as though polygraph's days are numbered.

For more information about the CVSA please visit,

or contact Lt. Kenneth Merchant at 888-358-5025 or email.

Read more news from the National Association of Computer Voice Stress


SOURCE National Association of Computer Voice Stress Analysts

-0- 03/04/2014

CO: National Association of Computer Voice Stress Analysts

ST: Delaware




-- PH75670 --

0000 03/04/2014 13:30:00 EDT

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