Lie-detector tests increasingly use voice stress analysis, a technology has gained in popularity as its software is refined, says the New YOrk Times. “It can really be done anywhere,” said Detective Pat Kemper of the Springfield Township Police Department in Ohio, who says he has used the voice-based testing to question thousands of suspects over the last decade. “It can be done via a telephone recording. It can be done covertly. You can use it for anything.”
In Britain, insurance companies use it to screen telephone claims in hopes of rooting out fraud. One insurer says 25 percent of its car-theft claims have been withdrawn since it began using the system a year ago. The technology’s reliability is still debated. The makers of one system, known as the Computer Voice Stress Analyzer, control access to the technology. “We only sell to law enforcement and the government,” said David Hughes of the National Institute for Truth Verification. The analyzer has been available since 1988; the company says it is used by 1,400 U.S. law enforcement agencies.