'World News': FBI Agent Accused of Taking Gifts, Cash From 'Snitch'

Ex-mobster Mani Culpayev says he gave FBI agent, jewelry, money.
2:16 | 05/29/13

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Transcript for 'World News': FBI Agent Accused of Taking Gifts, Cash From 'Snitch'
We have an investigation now into potential scandal deep inside the FBI. Allegations tonight of one of their agents -- -- lavish gifts even cash from a mobster turned informant. An investigation is underway and tonight that mobsters charged with murder. ABC's chief investigative correspondent Brian Ross is on the case. He has a long record of ruthless violence as a Russian mafia boss in New York a convicted pissed extortionist car thief. All around -- But an ABC news investigation found that many still -- is not in prison for life but living a life of luxury and fast cars in Florida. Thanks to his work as a government witness -- FBI informant. He was once described as one of the most important -- -- ever against the Rush Limbaugh is very Smart. He's managed play the system for years and years but authorities tell ABC news that supply -- continued to be protected by the FBI even as local police investigated. Whether he went back to his criminal ways. I need these people out of here right now allegations that angered supplies were from ABC news -- -- equipment but it. -- -- But a few days later Chicago invited us back. Bruins been around town and announce a -- and -- -- about his current activities and he flashed his no -- -- to. Diamond encrusted watch in you sit here now and say you're not involved in any ongoing Korea -- most definitely. Nothing whatsoever nothing whatsoever. That's not what police said as they swarmed into his business a few weeks later and arrested two volumes -- charges of murder. Prosecutors allege the FBI informants orders a hit and Atlanta rapper called -- faster. This is a very violent crime. This is a very vicious crime if true another FBI informant go on bat you have criminal ways and don't seem to go away I'm just smarter than you and that's it. And people can't stand it stupid people can't -- Smart people they work -- Adding to the FBI's embarrassment is an allegation that two -- FBI agent handler not only tried to interfere in the murder investigation. The took lavish gifts and cash the FBI says is now investigating that. Very serious and you -- a lot more tonight on Nightline that's okay Brian thanks very much.

This transcript has been automatically generated and may not be 100% accurate.

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