Influence peddling and money laundering allegations haven't been enough to topple Argentina's vice president, Amado Boudou. On Monday, illegal enrichment accusations were added to the mix when a federal prosecutor asked an investigative judge to open yet another probe against him.

Prosecutor Jorge Di Lello also asked Judge Ariel Lijo to investigate 10 businesses, including The Old Fund, a holding company reportedly linked to Boudou that took over a bankrupt printing company and secured a government contract to print Argentina's currency after Boudou and other top officials intervened on its behalf.

Also named in the probe request are Boudou's girlfriend, Agustina Kampfer; a longtime friend and business partner, Jose Maria Nunez Carmona; and another businessman, Alejandro Vandenbroele, who allegedly served as Boudou's proxy in a series of business deals.

The judge must now decide whether