MINNEAPOLIS (WCCO)-- It's a common practice used by attorneys and law enforcement – polygraphs. But, how do they work? And, how accurate are they? Good Question. The test can last up to two ...

On November 21, the Delhi Police were granted permission to conduct a polygraph test on Aaftab Poonawala, the accused in the murder of Shraddha Walkar. A polygraph test, also known as lie detector ...

The modern polygraph, better known as the “lie detector test,” is a fascinating little instrument with a long and controversial history. The earliest version a polygraph instrument was ...

Season 31 Episode 15: David Scroggins goes through the process of administrating a polygraph test and understanding the results.