The FBI gives a polygraph test to every single person who’s considered for a job there. When the DEA, CIA, and other agencies are taken into account, about 70,000 people a year submit to polygraphs while seeking security clearances and jobs with the federal government.
Polygraphs are also regularly used by law enforcement when interrogating suspects. In some places, they’re used to monitor the activities of sex offenders on probation, and some judges have recently permitted plea bargains that hinge on the results of defendants’ polygraph tests. Full Article