Bradley Birkenfeld is the most significant financial whistleblower of all time, so you might think he'd be cheering on the disclosures in the new Panama Papers leaks. But today, Birkenfeld is raising questions about the source of the information that is shaking political regimes around the world. Birkenfeld, an American citizen, was a banker working at UBS in Switzerland when he approached the U.S. government with information on massive amounts of tax evasion by Americans with secret accounts in Switzerland. By the end of his whistleblowing career, Birkenfeld had served more than two years in a U.S. federal prison, been awarded $104 million by the IRS for his information and shattered the foundations of more than a century of Swiss banking secrecy.

Bradley Birkenfeld, a former UBS banker, speaks during an interview at Schuylkill County Federal Correctional Institution in Minersville, Pa., on Tuesday, April 27, 2009. Bradley C. Bower | Getty Images

In an exclusive interview Tuesday from Munich, Birkenfeld said he doesn't think the source of the 11 million documents stolen from a Panamanian law firm should automatically be considered a whistleblower like himself. Instead, he said, the hacking of the Panama City-based firm, called Mossack Fonseca, could have been done by a U.S. intelligence agency.

"The CIA I'm sure is behind this, in my opinion," Birkenfeld said.

Birkenfeld pointed to the fact that the political uproar created by the disclosures have mainly impacted countries with tense relationships with the United States. "The very fact that we see all these names surface that are the direct quote-unquote enemies of the United States, Russia, China, Pakistan, Argentina and we don't see one U.S. name. Why is that?" Birkenfeld said. "Quite frankly, my feeling is that this is certainly an intelligence agency operation."

Asked why the U.S. would leak information that has also been damaging to U.K. Prime Minister David Cameron, a major American ally, Birkenfeld said the British leader was likely collateral damage in a larger intelligence operation.

"If you've got NSA and CIA spying on foreign governments they can certainly get into a law firm like this," Birkenfeld said. "But they selectively bring the information to the public domain that doesn't hurt the U.S. in any shape or form. That's wrong. And there's something seriously sinister here behind this."



The public relations office for the CIA did not immediately return a message for comment.

Birkenfeld also said that during his time as a Swiss banker, Mossack Fonseca was known as one piece of the vast offshore maze used by bankers and lawyers to hide money from tax authorities. But he also said that the firm that is at the center of the global scandal was also seen as a relatively small player in the overall offshore tax evasion business.

