From Reuters:
The United States indicted Wegelin, the oldest Swiss private bank, on charges that it enabled wealthy Americans to evade taxes on at least $1.2 billion hidden in offshore bank accounts, the U.S. Justice Department said on Thursday.
The announcement, by federal prosecutors in Manhattan, represents the first time an overseas bank has been indicted by the United States for enabling tax fraud by U.S. taxpayers.
More at that link.
Looks like the investigation into Mitt Romney's old Swiss bank, UBS, is what lead to the investigation of Wegelin. Presumably Mitt only had one Swiss account, but who knows? He's neglected to mention some of his accounts before.
This can't be good for Willard politically.