In June 2003, Rost filed a case under the False Claims Act (FCA) against Pfizer, claiming that Pharmacia defrauded the government by causing false claims to be filed, due to Pharmacia's illegal off-label marketing of Genotropin. The case was unsealed in November 2005, and the Department of Justice declined to intervene, leaving Rost to litigate on his own. Unbeknownst to Rost, Pfizer had already disclosed the off-label marketing effort at Pharmacia to the Department of Justice and fired the responsible parties. After Pfizer fired him in December 2005, Rost filed a wrongful termination lawsuit, while Pfizer said that they had planned to eliminate his position due to redundancies from the merger in 2003, but that they had kept him because they were aware of the FCA suit he had filed. Pfizer also said that they had informed the FDA of Pharmacia's marketing and kickback practices two weeks prior to Rost filing his FCA lawsuit and that they could not do so earlier due to securities laws related to the Pharmacia merger; they also said that government's decision not to intervene supported their contention that the lawsuit was baseless. The judge presiding over Rost's wrongful termination lawsuit ruled that the evidence showed Pfizer's version of events to be correct.