forensics slides done

forensics slides done - and found that Fryes confession was...

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7/19/11 The father of the modern lie detector. believed that verbal deception could be detected by changes in the systolic blood pressure used a standard a blood pressure cuff, or sphygmomanometer, to take measurements of systolic blood pressure during interrogation. Take and record the subject's blood pressure, release the cuff. Ask the William Moulton
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7/19/11 Question of the polygraph's reliability as a lie detector runs throughout history going as far back as the 1920s soon after William Marson started his studies on the correlation between blood pressure and lying. On November 25, 1920, James Frye shot down and killed a wealthy physician named Dr. Robert W. Brown at around 8:45 in the evening. Seven months later, Frye committed an armed robbery which led to his arrest on August 21, 1921. The police questioned him about the robbery and he confessed to it and to the murder of Doctor Brown. On June 10, 1922 Marston administered a a primitive lie detector test on Frye
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Unformatted text preview: and found that Fryes confession was a lie. The judge refused to use the results of the test and suggsted the death penalty for Frye but the jury influenced by the polygraph test sentenced him to life in Frye & Polygraph 7/19/11 Forensic Psychology and Polygraph The polygraph instrument consists of a physiological recorder which typically assesses three aspects of autonomic arousal: heart rate/blood pressure, respiration and skin conductivity-sweat gland activity. The exams are usually conducted in a quiet room, free from any distractions or outside noise. Only the examiner and the examinee are allowed in the testing area and the whole session is recorded both with video and audio. A typical polygraph test will take between 2 1/2 to 4 hours and involves a comprehensive interview around the issues that are to be investigated. Most commonly requested uses are for criminal matters and to monitor convicted sex offenders. 7/19/11 polygraph testing...
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forensics slides done - and found that Fryes confession was...

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