The legal odyssey of an Indiana University economics professor-turned-whistleblower who tried to take on Citigroup in a $2.4 billion qui tam suit alleging that the bank improperly used a federal tax break to evade New York state taxes appears to be over.

In a brief order, the Appellate Division, First Department affirmed a Manhattan judge’s ruling to dismiss Eric Rasmusen’s suit, finding that his allegations that Citigroup underpaid its taxes are in the public domain, and thus a whistleblower suit is not justified.