The Jessica Lunsford Murder Case
CVSA outperforms the
Polygraph once again
As reported by Lt. David Wyllie of the Citrus County Sheriff’s
Office, Florida, in the very first days of the Jessica Lunsford
abduction and murder case, several very good suspects were
developed, including her father. Since Lt. Wyllie headed
the Special Victims Unit at the time of Jessica’s disappearance,
and was also a seasoned CVSA Examiner, he requested that two
suspects take a CVSA examination. Jessica’s father and
another suspect agreed, and the CVSA cleared Jessica’s father.
The other suspect became highly emotional and combative with
police officials, and therefore a valid CVSA examination could
not be conducted.
By this time in the investigation the father was still the best
suspect, and investigators from the Florida Department of Law
Enforcement (FDLE) decided they wanted an FDLE polygraph
examiner to conduct a polygraph of him. The FDLE polygraph
Jessica’s father to be “Deceptive”
regarding the same issues for which the CVSA examination had
FBI investigators on the task force then requested that the
father and the other suspect be tested
by an FBI polygraph examiner. Both suspects agreed, and
took an FBI administered polygraph.
The results of both suspects’ examinations were determined to be
– meaning these polygraph examinations were basically useless.
Based on the conflicting results between the CVSA and the
polygraph examinations, both Jessica’s father and the other
individual were considered persons of interest for an additional
25 days until the killer, John Couey, was caught and confessed
to her abduction and brutal murder. In the end the CVSA was
accurate, and both the FDLE and FBI polygraph tests were wrong.
Jessica’s father could have been cleared as a suspect nearly an
entire month earlier had all the investigating agencies relied
on the more accurate results of the Computer Voice Stress
Analyzer® (CVSA) rather than the old and
less-accurate polygraph test.
In fact, Lt. Wyllie and other examiners at the Citrus County
Sheriff’s Office report that the CVSA has been so accurate over
the past 15 years that the results from the CVSA are routinely
solicited and accepted by the courts and attorneys in their