Former Bear Stearns mortgage executives who now run mortgage divisions of Goldman Sachs, Bank of America, and Ally Financial have been accused of cheating and defrauding investors through the mortgage securities they created and sold while at Bear. According to e-mails and internal audits, JPMorgan had known about this fraud since the spring of 2008, but hid it from the public eye through legal maneuvering. Last week a lawsuit filed in 2008 by mortgage insurer Ambac Assurance Corp against Bear Stearns and JPMorgan was unsealed. The lawsuit's supporting e-mails, going back as far as 2005, highlight Bear traders telling their superiors they were selling investors like Ambac a "sack of sh*t."