Polygraph exams are commonly called "lie-detector tests" but experts say that's not true. The FBI and other agencies are using polygraphs to find leakers. But do they work? Federal agencies have ...

Fox News host Greg Gutfeld has been slammed after calling for “Today” show co-anchor Savannah Guthrie, whose 84-year-old mother Nancy has been missing for 12 days, to undergo a lie detector test.

According to FOX News, authorities with the Pima County Sheriff's Department are conducting polygraph testing on Wednesday. It is unclear if the testing is tied to the investigation into Nancy Guthrie ...