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The Computer Voice Stress Analyzer (CVSA) is a lie detector "said to be able to determine truth or deception by tone of voice or stress level." The machine has "been sold to hundreds of police departments and the U.S. military," with these organizations using it to put people in jail and interrogate terror suspects even though "not a single scientific study has been done to show the CSVA actually works." The Pentagon has now banned use of the machine. An ABC News investigation discovered that while the machine is sold for $10,000 apiece with claims of 98 percent accuracy, some of its convictions have been overturned. In addition, CSVA creator and National Institute for Truth Verification CEO Dr. Charles Humble is "not a medical doctor and does not have a PHD from an accredited university. Instead, he was awarded a Dr. of Psychology after taking a few hours of bible studies at a bible college which was located in an Indiana strip mall."