Estimated read time: 3-4 minutes
This archived news story is available only for your personal, non-commercial use. Information in the story may be outdated or superseded by additional information. Reading or replaying the story in its archived form does not constitute a republication of the story.
TO BUSINESS EDITORS:
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 CVSA1.com, NACVSA.org
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
CO: National Association of Computer Voice Stress Analysts
-- PH75670 --
0000 03/04/2014 13:30:00 EDT http://www.prnewswire.com
Copyright © The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.