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Although newspapers reported that a murder victim had been stabbed with a knife, two police investigators knew that the actual murder weapon was a letter opener. While carefully monitoring the changes in the heart rate and perspiration level of a prime suspect, the investigators asked him if he typically used a letter opener on his mail. The investigators were making use of the______________.

Respuesta :

Answer:

guilty knowledge test

Explanation:

Guilty knowledge test: The guilty knowledge test is also denoted as GKT, and is referred to as the psycho-physiological questioning technique which is being utilized as a part of the polygraph examination that assesses the suspects in terms of concealing guilty knowledge through measuring his or her physiological response while performing a specific series of a few multiple-choice questions.

The given statement in the question signifies that the investigators were using the guilty knowledge test.

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