1.   An undercover FBI agent posed as a customer and was introduced to Levin by the informant, the record says.

2.   Armstrong, the NFLPA president, said he has spoken to Florida players this summer to remind them of the dangers that agents pose.

3.   Beverly said undercover federal agents posed as drug dealers and approached the defendants, seeking protection or transport help as they moved phony narcotics about the city.

4.   A customs agent posed as a middleman able to secure easy passage for contraband through the port in Oakland, Calif.

5.   According to criminologist Cecil E. Greek, federal agents posed as pedophiles, sexually interested young men or girls, pen pals, or sympathetic hedonists.

6.   Agents posed as importers interested in getting into the spy equipment business.

7.   Entrapment has become a common defense to the increasing number of sex crime prosecutions resulting from government sting operations on the Internet, where agents typically pose as children.

8.   In some cases, the agents posed as children and waited to be propositioned by adults.

9.   In some cases, the agents posed as drug dealers seeking to foil a federal investigation.

10.   That agent posed as a mobster who wanted to invest in arms deals, a federal official said.