The Department of Homeland Security has begun performing polygraph tests on employees to determine who might be leaking information to the media about immigration operations, according to four sources ...

The White House has put a stop to Defense Secretary Pete Hegseth’s alleged use of polygraph tests in an attempt to root out leakers to the press, according to a new report. As Hegseth became embroiled ...

Karl Sander’s disputed polygraph test has been declared invalid after serious examiner errors emerged at the Madlanga Commission, raising questions about how lie detector tests work.

Even if polygraph tests are not accurate, the threat of a test can serve as a deterrent or as an interrogation tool to elicit admissions. Leonard Saxe is a professor of Contemporary Jewish Studies and ...