"This device is nothing more than a prop," said John Palmatier, who earned a doctorate in psychology and who studied the machine for the Michigan State Police Department, where he worked. He said his study along with others found no scientific basis for Humble's claims.
"You could not accurately discriminate between truthful and deceptive subjects using that device," said Palmatier. As to whether the device could be used as a scare tactic, Palmatier answered, "Oh, exactly. Police officers have for years."
In his view, Palmatier said that explains the police endorsements that Humble puts in his promotional materials, citing one case after another solved with the stress-analyzer machine.
Humble said the machine can only really be tested in the field, where he said it has a 98 percent accuracy rate.
"We teach that it's an investigative tool. It's not meant for a detective to go out and get a search warrant or to get an arrest warrant," Humble said.
But that is not exactly what happened in Las Vegas in the case of Vincent Sedgwick, married with a young daughter. He was wrongly charged with rape, which carried a possible life sentence. His arrest warrant was based largely on his supposed failure on a CVSA test.
"I went from shock to anger and a lot of resentment, very bitter toward them for doing that," recounted Sedgwick.
Equally outraged, Lee Gates, the judge in the case, threw out the charges against Sedgwick and harshly criticized the police for relying on a machine that he called scientifically unreliable.
"Not only did they use it for investigative purposes, but they used it as a predicate to get him arrested and to have him charged and brought into the criminal justice system, which I think was the biggest miscarriage of justice," said Gates.
In the promotional videos that Humble uses to sell his machines to American law enforcement, there is no mention of Sedgwick's and Crowe's cases.
"Before you go and ruin a man's life, it's important to verify the allegations of child molest, rape, that sort of thing," Humble said in the video.
Although throughout the video Humble is referred to as Dr. Humble, "Primetime" discovered that he is neither a medical doctor nor has he earned a doctorate from an accredited university.
Instead, the diploma on his office wall, which reads "Doctor of Psychology," is an honorary degree, awarded by a Bible college in Indiana that used to have an office in the strip mall where Humble's first office was located.
Pressed as to whether giving himself the "doctor" title is honest, Humble replied, "I think it is."
Finally, Humble claims his firm sold more than a million dollars worth of his machines to the U.S. military.
Military officials confirmed to "Primetime" that the machines were in use in prisons in Guantanamo Bay in Cuba and Iraq until the Pentagon finally banned them.
Robert Rogalski, deputy undersecretary of defense for counterntelligence, said that an exhaustive Pentagon-ordered study of the stress analyzer, whose results are now being made public, found little or no relationship between the machine's reading and the actual presence or absence of deception and stress.
"We feel we need a greater reliability, just as the report indicated, chance, in other words, flipping a coin," said Rogalski.
He was alarmed to hear about a document from Humble's company that bragged that one of its employees had used the machine in Baghdad to free a number of suspected terrorists.