Add Yahoo as a preferred source to see more of our stories on Google. American inventor John Larson, right, demonstrates the operation of a polygraph at Northwestern University in Evanston, Illinois, ...

A polygraph test is a scientific examination that measures a person's physiological responses, such as heart rate, blood pressure, breathing pattern, and sweating, while they answer a series of ...

Federal agencies have stepped up their efforts over the past few weeks to find potential leakers, and some — like the FBI, the Department of Homeland Security and the Department of Defense — are ...

State investigators decided against bringing charges against a Midlands mayor over an alleged assault, even as Chapin Mayor Bill Mitchell potentially failed a polygraph test when questioned about the ...