Dee J. Hall reports for the Wisconson State Journal that “Dr.” E. Gary Baker, the faux Ph.D. who markets what he styles a “Digital Voice Stress Analyzer” to law enforcement agencies, has lost the Jefferson, Wisconsin Police Department as a customer:
Jefferson police cancel training on voice-stress analyzer
By DEE J. HALL
The city of Jefferson Police Department has cancelled a training session on how to use a controversial voice-stress analyzer after the Wisconsin State Journal raised questions about the technology and the qualifications of the business owner scheduled to conduct the training.
Voice-stress analysis is used by some law enforcement agencies in Wisconsin, including the Jefferson County Sheriff’s Office, to detect “microtremors” in the voice that backers of the technology say indicates speakers are stressed and therefore answering questions deceptively.
“If everything has been exhausted in investigative techniques and they have a suspect or someone they want to eliminate as a suspect, it (CVSA) has been used,” Madson said, adding that the technology has prompted confessions from suspects. “The tool works, as far as I’m concerned.”
Detective Sergeant Tim Madson is badly misinformed. The existing peer reviewed research suggests that voice stress analyzers perform at roughly chance levels of accuracy. While these devices might be useful for scaring confessions out of naive and gullible persons, they have no scientific basis and are no more to be relied upon than a colander wired to a photocopier with a sheet of paper saying “He’s Lying” on the glass paten. Continue reading Baker DVSA Loses a Customer