A former FBI official has been arrested over his ties to a Russian oligarch charged with violating US sanctions. He was arrested on Saturday afternoon after arriving at JFK following a trip to Sri Lanka and retired from the FBI in 2018. Law enforcement says he has links to metal mogul Oleg Deripaska, a Russian billionaire who was sanctioned by the US in 2018 and then charged with violating them last year. Both men are facing money laundering charges as well as violating sanctions – with each of the four counts carrying a maximum of 20 years in prison. 'Russian oligarchs like Oleg Deripaska perform global malign influence on behalf of the Kremlin and are associated with acts of bribery, extortion, and violence.