Guest blog post by Kenneth E. Blackstone. Invented in 1921, the modern polygraph is still in the headlines: The mother of missing baby Lisa Irwin, Deborah Bradley of Kansas City, admitted she failed a polygraph test in the case. Sarah Palin and her husband Todd have been offered $1 million by a “married but dating” website to take a polygraph test and answer questions about allegations of cheating within their marriage. Joseph Melendez of Elyria, OH, was awarded $1.5 million …
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