Ahmed al-Jibouri's U.S. business partner was a beneficiary of Saddam Hussein's deals.
The government has interviewed top officials and is gathering more data in its own investigation.
The investigation uncovered more than 100,000 documents.
A few years later, Kevin Abikoff was providing legal advice to the shady company.
It was only a matter of time before the Panama Papers controversy and the Unaoil bribery scandal overlapped. Leaked emails
The report named several Iraqi officials, including former oil minister Hussein al-Shahristani who it alleged had accepted millions of dollars in bribes.
Unaoil relied on both banks as it cut deals with corrupt regimes.
The feds are working with Australian and British investigators to investigate Monaco firm Unaoil and its partners.