A polygraph examination of a suspected murderer included an assessment of his reaction to details regarding the victim's clothing and death wounds-details that would be known only to a person at the scene of the crime.The investigators were using

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The investigators were using the guilty knowledge test, which involves asking specific questions about the crime that only the guilty individual would know the answer to. By assessing their physiological responses, such as changes in heart rate or skin conductance, the polygraph can determine if the suspect possesses such "guilty knowledge."

A Polygraph Examination of a Suspected Murderer Included an Assessment