jeff veltri: i feel as confident as i'm going to feel about it. you're never going to stop anyone who is morally bankrupt and has a price for their integrity. is. sharyl: tomsheck retired last year. customs and border protection reversed his negative review and, in april, settled his whistleblower case. the agency has now begun polygraphing all new customs and border patrol applicants. but it's not a good sign that the majority are flunking the lie detector tests. next on "full measure." they're known around the world as bobbies, england's police force. now, the threat of terrorism is bringing a radical change to sharyl: a time-honored tradition is under assault across the pond. most british bobbies work the beat without a guns, armed with only a billy club. now, there's a shift in that longstanding policy. scott thuman shows us how terror is altering the way of life in london. scott: walk the beat with a british police officer and something may seem amiss to the average american -- there's no gun. in fact, you'd be hard pressed to find a so-calle

jeff veltri: ultimately, the began dating. she indicated to him at one point that she wanted to cross a friend or a relative. sharyl: an illegal immigrant? jeff veltri: an illegal immigrant and she gave him $500 in exchange. from that, what we would call in law enforcement, he got a taste, and that was the beginning of his corrupt activities. sharyl: officer taylor smuggled people and drugs for three years before getting caught. but there was another target in jeff veltri: she ended up corrupting yet another customs and border protection officer and that would be mr. lorne "hammer" jones. sharyl: in a decade-long crime spree, officer jones helped smuggle in people and 33 tons of marijuana. one reason the dark side is so tempting is because the pay-off is so big. border agents and officers make $38,000 to $69,000 a year. what kind of money can t corrupt agent? jeff veltri: they could, in theory, make more in an evening than they, in their annual salary, would garner. sharyl: the fbi now has 22 border corruption task forces dedi