(Bloomberg) -- Thirteen Swiss banks face rising stakes in their own criminal probes after Credit Suisse Group AG set a new standard for punishment in the U.S. crackdown on offshore tax evasion.

Julius Baer Group , Zuercher Kantonalbank and the Swiss unit of HSBC Holdings are among those seeking to avoid pleading guilty to helping Americans cheat the Internal Revenue Service -- an unprecedented step taken by Credit Suisse on May 19. Their degree of wrongdoing and cooperation with investigators will help decide their fate, said the top U.S. tax prosecutor.

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