20 billion?

MIAMI (Reuters) - The former head of UBS AG's wealth management business, Raoul Weil, was formally declared a fugitive on Tuesday after failing to surrender to U.S. authorities on charges of conspiring to help wealthy Americans hide assets from U.S. tax authorities.

Prosecutors in Miami released a copy of a judge's brief order putting Weil on the court's fugitive list, but said they would have no further comment.

An indictment unsealed in November alleged that Weil and other unidentified bankers conspired to help 17,000 Americans hide $20 billion of assets in Swiss bank accounts in order to avoid paying U.S. taxes.