A husband and wife distressed by the criminal charges they faced knew what they were doing when they pleaded guilty, a federal appeals court has held.The 7th U.S. Circuit Court of Appeals last week rejected the argument that George and Barbara Gasich should have been allowed to withdraw their pleas and go to trial on charges of making false statements on their income tax returns.The court conceded a psychiatrist determined that George was suffering from post-traumatic stress disorder and Barbara from severe depression when …