Federal prosecutors claim Baltimore City Council President Nick Mosby falsely claimed thousands of dollars on his tax return to cover his financial troubles. Prosecutors said Mosby and his ex-wife — former city State’s Attorney Marilyn Mosby — did not make enough money between them to account for the amount of donations they claimed. Mosby took the stand yesterday during the federal mortgage fraud trail of his ex-wife. Last week, Mosby testified that his tax problems and mismanagement of their finances were responsible for his ex-wife’s legal troubles as well as their divorce. Today, prosecutors plan to cross-examine the Florida mortgage broker for Marilyn Mosby.