Detroit Emergency Manager Kevyn Orr testified that the city asked a U.S. regulator to consider bringing charges against two banks for costly interest-rate swaps that factored in the city's record-setting municipal bankruptcy case, Reuters reported on Friday. Orr said that Detroit asked the U.S. Securities and Exchange Commission to investigate its deals with UBS AG and Merrill Lynch Capital Services, a unit of Bank of America , for interest rate swaps to hedge risk on some of the $1.4 billion of pension debt Detroit sold in 2005 and 2006. The city thought there were "serious questions" about whether it owed the banks anything at all, Orr testified, and Detroit weighed trying to invalidate the swaps. But officials decided chances of prevailing in court were only "more or less 50/50," so it decided to bargain with the banks instead. Orr testified before Bankruptcy Judge Steven Rhodes at a hearing about a Christmas Eve deal to end the swap agreements for $165 million plus fees. That represents a 43 percent discount for Detroit, steeper than one initially proposed. Judge Rhodes, who is overseeing Detroit's bankruptcy case, sent the city and the banks back to the bargaining table after postponing a hearing about the earlier deal to terminate the swaps for $230 million, or 75 cents on the dollar.