Nancy Guthrie’s family members have reportedly undergone polygraph tests as investigation deepens in the missing case.

Editor’s note: This story has been updated to correct the date of Amber Spradlin’s death. We regret the error. FLOYD COUNTY, Ky. (FOX 56) — Interview ...

A recent polygraph test taken in Orange County, Calif., has brought the validity of polygraphs — also called “lie detector tests” — into question. Even though some police departments and ...

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 ...