Nearly every episode of "Dateline" involves the suspect failing a lie detector test but do lie detectors actually detect lies? Should the investigators have used one in Kristine's case? Join Kylie and Rory as they explore the realm of polygraphs, including a rich history of creation!

References:
http://www.kellypolygraphe.com/polygraph-history.php
https://www.crimemuseum.org/crime-library/criminal-law/what-is-a-polygraph/
https://www.tandfonline.com/doi/full/10.1080/23744006.2015.1060080#:~:text=The%20first%20polygraph%20was%20created,(1932).
https://spectrum.ieee.org/a-brief-history-of-the-lie-detector
https://en.wikipedia.org/wiki/Polygraph
https://www.lawinfo.com/resources/criminal-defense/are-lie-detector-tests-admissible-in-court.html
https://www.cbc.ca/news/politics/polygraph-test-tbs-1.5840147#:~:text=Canadian%20courts%20have%20refused%20to,a%20person's%20guilt%20or%20innocence.
https://www.cvsa1.com/press-releases/killer-passes-polygraph-innocent-man-fails-killer-goes-on-to-kill-again/