He revealed that half the officers in a key unit failed a polygraph test last year.
Hatfill said he has taken one polygraph since January, and was told he had passed it.
Sullivan said he decided to start the polygraph tests after taking one himself when he was hired.
Although not yet foolproof, these three methods do offer possible alternatives to the antiquated techniques of the polygraph.
He worked on improving the efficiency of the polygraph the lie detector and conducted some 15, 000 tests with the instrument.
But when you pull out that letter of intent, she freezes up like a politician on a polygraph.
Two problems with polygraphs: First, they only work about 80% of the time, according to the American Polygraph Association.
Unlike a polygraph test, which checks for lies, Nemesysco's systems work as an "emotion detector, " says Nemesysco CEO Amir Liberman.
CNN: Behavioral screening -- the future of airport security?
Police did question and administer a polygraph to a boy in the community who Hall liked and was friendly with.
Current workers at Fort Detrick are being given polygraph tests by the FBI to see if any leads may materialize.
Currently, many scientists who are knowledgeable about anthrax are taking polygraph tests and undergoing interviews as investigators try to uncover suspects.
The polygraph results are unclear, and police interrogation of the boy and their search of his vehicle did not provide any leads.
Just as the polygraph will let some who are lying slip by, it can also falsely identify others who are not lying.
Why, then, despite failing a polygraph test, was the chief suspect at Los Alamos National Laboratory fired only after the spy story broke?
Justice Department attorneys conducted interviews with Huang over 20 days and he took several polygraph tests before the deal was made, the sources said.
The nine remaining agents took polygraph tests, and although none of them failed, some responses led to the loss of several jobs, he added.
He has agreed to a police search of his apartment and has offered them the results of a polygraph examination administered by his own expert.
Certain individuals, know matter what they say, will fail the polygraph.
Steps taken so far include bringing home the agents involved, stripping them of their security clearance and questioning that has included at least one polygraph exam.
Ray took two polygraph tests and both times, examiners concluded he killed King and acted alone, though experts, of course, disagree about the worth of such tests.
According to some sources, he was ruled out almost immediately due to what was then perceived as an air-tight alibi, substantiated under polygraph by a number of eye-witnesses.
U.S. Secret Service officials told lawmakers Thursday they are arranging polygraph and drug tests for employees implicated in an alleged prostitution scandal, and additional ousters are expected in coming days.
Certain individuals are capable of such deception. (If the perpetrator is in some state of denial, for example, their responses may not register on the polygraph.) Tommy, we know, successfully lied to Dr. Lesse.
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