NewsSuccess Stories with the use of the CVSA
Law Enforcement Embracing Improved Accuracy and Efficiency of New Crime Fighting Technologies
DNA and Computer Voice Stress Analysis Help Clear the Innocent, Find the Guilty
LEWES, Del., March 18, 2014 /PRNewswire/ — Innocent people are being exonerated in record numbers as new technologies such as DNA become more sophisticated and the Computer Voice Stress Analyzer (CVSA) is increasingly being used for truth verification instead of the old polygraph. This is according to Clifford Payne, an Investigator with the Atlanta (GA) Police Department who also serves as a Regional Director of the National Association of Computer Voice Stress Analysts, an organization representing the nearly 2,000 US law enforcement agencies that utilize the CVSA.
“As law enforcement professionals, our main goal is to make sure only the guilty are prosecuted,” stated Payne. “With the refinement of DNA testing we are now better able to accurately determine where the criminal justice system failed in the past as innocent men and women, some whose lives are ruined forever, are being released from prison on a regular basis. This is in no small part due to organizations such as the Innocence Project, improved DNA testing, and the help of technologies such as the CVSA.”
Miami-Dade (FL) Police Det. Lisa Morales is among the thousands of detectives that have experienced this first hand. Det./CVSA Analyst Lisa Morales reported that a female subject was accused of repeatedly stabbing her ex-boyfriend and children’s father. There was an adult male witness that implicated the female and uniformed officers were poised to arrest her based on both men’s statements even though the female insisted that she was being “framed” by the two men. The investigating detective just had one of those feelings and asked if Det. Morales would run a CVSA exam on the female. She passed and the “witness” ultimately confessed that he stabbed his uncle and they conspired to have the female falsely arrested so that the father could get custody of the children because the female refused to reconcile with him. According to the NACVSA, this is just another example of the CVSA exam being used to clear someone rather than implicate them. (Read more Real Cases at CVSA1.com/realcases.htm)
Payne stated that before the CVSA, law enforcement had to rely on the old polygraph. “Our main problem was that 30% of polygraph examinations are ‘inconclusive’, meaning that there were no discernible results. With the CVSA, there are always correct results 100% of the time. When you also take in to account that it takes eight weeks to train a polygraph examiner and only five days to train a CVSA examiner, plus the fact that polygraph exams take between 2-3 hours and the CVSA exam can be performed in 1 hour with perfect results, it is clear which system to use.” The Atlanta Police Department discontinued the polygraph in 2003 in favor of the CVSA.
Major US law enforcement agencies such as those in Atlanta, New Orleans, Nashville, Baltimore, and Miami, as well as the California Highway Patrol, depend upon the CVSA to investigate criminal cases as well as for screening police applicants. “As an investigative and decision support tool the CVSA has proven itself to be invaluable to law enforcement,” stated Lt. Kenneth Merchant, of the Erie, PA Police Department, who serves as the Legislative Affairs Director for the NACVSA.
For further information on the NACVSA, contact Diana Montoya at 888-358-5025 or via email.
For further information on the CVSA visit CVSA1.com or call 561-798-6280.
Read more news from National Association of Computer Voice Stress Analysts.
Government Security News Magazine
Federal judge approves computer voice stress analysis to monitor sex offenders
Tue, 2014-03-11 08:55 PM
By: Ashley Bennett
A recent ruling from a U.S. Federal court judge may require sex offenders to submit Computer Voice Stress Analyzer (CVSA) examinations throughout the post-release supervision process. Northern District of New York Chief Judge Norman Mordue ruled that the CVSA examinations are comparable to the polygraph examinations that are accepted as means of monitoring sex offenders under post-release supervision by the 2nd U.S. Circuit Court of Appeals. “As an investigative and decision support tool the CVSA has proven itself to be invaluable to law enforcement,” said Lt. Kenneth Merchant, a member of the Erie, PA police department and legislative affairs director for the National Association of Computer Voice Stress Analysts (NACVSA). CVSA technology is designed to function like a verbal lie detector test. The computer system records and analyzes voice samples to detect the presence of stress and tension in a person’s voice. The presence of certain amounts of stress in the voice can alter the vocal pattern and serve as an indication of deception. A recent DoD survey of law enforcement officials that used CVSA technology revealed that 86 percent found it to be “very” or “extremely” accurate. This survey also revealed that CVSA had “a very small error rate” of less than half a percent and that the majority of the deceptive results were validated by obtaining confessions. CVSA technology is currently in use throughout various law enforcement agencies across the country in Miami, Atlanta, Baltimore, New Orleans, and Nashville. Some of the testimony during Chief Judge Mordue’s court ruling also mentioned that nearly 1,800 law enforcement agencies throughout the U.S. have CVSA technology. Law enforcement agencies use the technology to screen candidates applying to work for the police department, to monitor offenders, and to pursue criminal investigative work.
18-Year Field Study Validates Truth Verification Technology
Lewes, DE — (SBWIRE) — 01/11/2013 — A newly published research study in the 2012 annual edition of the scientific journal Criminalistics and Court Expertise reports the accuracy rate of the Computer Voice Stress Analyzer (CVSA®) is greater than 95%, an assertion long made by the system’s manufacturer. The study’s results are further bolstered by current US Government funded voice analysis research which has established voice technologies performed well for border security applications.
The CVSA has been available to law enforcement agencies in the US since 1988, first as an analog device, and since 1997 in a digital version. The CVSA is the only Voice Stress Analyzer in the world with two US Patents and the only system worldwide incorporating the FACT® scoring system, which uses scientifically validated processes to reliably and precisely evaluate the results of CVSA examinations. The CVSA is now used by close to 2,000 agencies and is the most widely used truth verification system in the US.
The 18-year field study was conducted by the recently deceased Professor James L. Chapman. The study, titled “Long-Term Field Evaluation of Voice Stress Analysis In a North American Criminal Justice Setting” is the crowning achievement of Professor Chapman’s legacy. Professor Chapman was known as the world’s foremost authority on the application of Voice Stress Analysis technologies, and at the time of his passing he also served as the Director of Standards and Training for the National Association of Computer Voice Stress Analysts (NACVSA), the world’s largest professional association of Voice Stress Analysis practitioners. His career spanned over 40 years as a criminologist, educator and researcher, during which he conducted more than 15,000 Voice Stress Analysis examinations. The study’s co-author, Marigo Stathis, a neuroscientist and research analyst, has been the primary or co-author of 27 published scientific articles and studies focusing on various topics related to the human brain and biology.
Professor Chapman used the CVSA to conduct the research and the results achieved were highly consistent throughout the period the study’s data were collected. The study’s findings revealed the CVSA, when used as an investigative support tool, can accurately predict whether a person under investigation is being truthful or deceptive. The study’s findings are supported by scientifically-accepted statistical models, and by the 96.4% validated confession rate Professor Chapman attained during the course of the 18-year study. According to current scientific research and meta-analyses, police confession rates worldwide vary between 20-45%, with even the most experienced police interviewers only achieving a 50-55% confession rate. Empirical data collected by the CVSA’s manufacturer, US law enforcement and US military CVSA users have long supported such findings; however, this is the first independent and peer reviewed scientific study to validate these data. Additional studies and research are planned for the future.
For further information please contact Carol Graham, Administrator for the NACVSA at firstname.lastname@example.org.