An Introduction to the Physiology of Speech Production for Law Enforcement Professionals
As a law enforcement agent, you’ve likely heard about the growing popularity of the Computer Voice Stress Analyzer (CVSA®). Perhaps you’ve read case studies about some of the challenging investigations CVSA has helped solve. Maybe you’ve heard success stories from...
How CVSA Revealed False Criminal Allegations by a Psychologically Challenged Individual
When a person comes forward with injuries and evidence of a serious assault, law enforcement must first consider them the true victim of a crime. But sometimes, those injuries are self-inflicted. People have reported rape or assault to implicate someone else or to...
How CVSA Truth Verification Helped Solve the Cold Case Murder of an Elderly Woman
When 87-year-old Loretta Sinnen went missing from her Menominee, Michigan apartment in 1976, the Menominee County Sheriff’s Department opened an investigation. Loretta had been a staff writer for the Menominee County Free Press for many years and was well known in the...
Understanding the Physiological Tremor: How Stress Affects the Autonomic Nervous System
While law enforcement agencies around the country are adopting Computerized Voice Stress Analysis (CVSA) technology, there remains some skepticism within the community about its reliability. But if you understand the science behind the system, you will realize that...
A Scientific Comparison of the CVSA Versus Alternative Truth Verification Methods
Scientists have developed multiple techniques to detect deception, but it’s important for law enforcement to understand that not all truth verification methods are created equal. Compared to handwriting analysis, the polygraph, and body language or behavioral...
Reading a CVSA Chart: How Voice Frequencies Translate to the Page
Recent advances in law enforcement technology abound, which can sometimes make officers wary about whether these innovations really work. One newer technological advancement is the Computer Voice Stress Analyzer (CVSA), which makes it possible to identify signs of...
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