Bradley Birkenfeld UBS

Bradley Birkenfeld (R) walks down the steps of the federal courthouse with his lawyer David E. Meier after he was sentenced to 40 months in prison by the judge on August 21, 2009 in Fort Lauderdale, Florida. Birkenfeld is a former UBS private banker who was a key informant for the US government in a tax evasion case against the Swiss bank, which was helping wealthy Americans dodge income taxes through secret accounts.