WikiLeaks plans to release data on about 2,000 cross-border bank accounts provided by a former Julius Baer Group Ltd. employee, who says they may have been set up to evade taxes, Bloomberg reported.

Rudolf Elmer, who was dismissed as chief operating officer by Julius Baer Bank & Trust Co. Ltd. in the Cayman Islands in December 2002, handed over the information today, including data on 40 politicians, to WikiLeaks founder Julian Assange.

“There will be a full revelation,” Assange told reporters today in London, adding that the data will take at least two weeks to check and disseminate. Elmer “is a whistleblower, and he has important things to say,” he said.

WikiLeaks drew condemnation from the U.S. government for posting thousands of classified U.S. diplomatic communications and military documents to its website, including a video of a July 2007 helicopter attack in Iraq that killed a Reuters television cameraman and his driver.

Elmer will be tried on Wednesday in Zurich, charged with several counts of attempted duress, including threats to Julius Baer and its employees, as well as breaching Switzerland’s banking secrecy laws.

The former employee “embarked in 2004 on a personal intimidation campaign and vendetta against Julius Baer,” the Zurich-based bank said in a statement. “He also used falsified documents and made death threats against employees.”