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After a polygraph test indicated that Gardner had information about Horn, he confessed to killing her and led police to a shallow grave where he buried the body. He also confessed to killing Gretzinger and Shelley, giving police a tour of the crime scene for Gretzinger's murder, but later retracted his confession and tried to blame an unknown ...
This location was less than a quarter of a mile from the Potts' Linnet Avenue household and an estimated three-minute walk from her home. [2] The two rode to the park together on their bicycles, leaving the Potts household at around 6:55 p.m. Potts was dressed in a reddish-pink turtleneck shirt, blue denim jeans, a navy blue jacket, and brown ...
American inventor Leonarde Keeler testing his improved polygraph on Arthur Koehler, a former witness for the prosecution at the 1935 trial of Richard Hauptmann. A polygraph, often incorrectly referred to as a lie detector test, [1] [2] [3] is a pseudoscientific [4] [5] [6] device or procedure that measures and records several physiological indicators such as blood pressure, pulse, respiration ...
After 45 years, authorities in California were finally able to tell the Gonzalez family who they believe killed their loved one. The Riverside County Sheriff’s Office used DNA and forensic ...
Grover Cleveland "Cleve" Backster Jr. (February 27, 1924 – June 24, 2013) was an interrogation specialist for the Central Intelligence Agency (CIA), best known for his experiments with plants using a polygraph instrument in the 1960s which led to his theory of primary perception where he claimed that plants feel pain and have extrasensory perception (ESP), which was widely reported in the media.
He postulated that lying requires increased brain activity compared to truth because the truth must be suppressed, essentially creating more work for the brain. In 2001, he published his first work with lie detection using a modified form of the Guilty Knowledge Test, which is sometimes used in polygraph tests. [3]
The biomarker test is a spinal tap test (also called a lumbar puncture) that uses a needle to remove cerebrospinal fluid (i.e. the fluid inside your spine) to look for these specific clumping ...
Workplaces in the United States must display this poster explaining the Employment Polygraph Protection Act to employees. The Employee Polygraph Protection Act of 1988 (EPPA) is a United States federal law that generally prevents employers from using polygraph (lie detector) tests, either for pre-employment screening or during the course of employment, with certain exemptions.