FBI Agent Took Gifts and Cash, Ex-Mobster Informant Alleges
Informant says agent "obstructed" murder case, FBI opens internal investigation.
Watch: VIDEO: FBI Informant in His Own Bleepin' Words
Brian Ross speaks with Mani Chulpayev, former mobster-turned-snitch.
Watch: 'Nightline': The Murder, the Mobster and the FBI (1)
Part 1: FBI snitch Mani Chulpayev blows up at Brian Ross over criminal allegations.
Watch: 'Nightline': FBI Informant Accused of Murder (2)
Part 2: Mani Chulpayev accused in the killing of Atlanta rapper Lil Phat.
Watch: 'World News': FBI Agent Accused of Taking Gifts, Cash From 'Snitch'
Ex-mobster Mani Culpayev says he gave FBI agent, jewelry, money.