. >> reporter: richard tanner says the call took him by surprise. >> i literally was about to hang up when they said, "are you at this address?" and it was my p.o. box that i've had for many, many years. >> reporter: the man on the other end said he was sergeant wade marshal with the sheriff's department and tanner owed fines of $1,600 for failing to appear for jury duty. >> he immediately launched into this very polished sounding-- i mean, very authentic-sounding speech about "we're calling you as a courtesy. you have several outstanding citations." >> reporter: tanner told him he had served jury duty, but the sergeant gave him case and citation numbers. he instructed tanner to pay up immediately or face a warrant for his arrest. the call went on for nearly 40 minutes on his landline before tanner used his cell phone to call the local sheriff's department. >> the first thing i said was, "is there a sergeant wade marshall?" and i barely got the words out when the real sheriff's department said,"no, it's a scam, hang up." >> law enforcement would never make such a request. >> reporter: u.s.