Last month, U.S. officials also accused BP of manipulating the U.S. propane market, a charge BP has said it will contest in court. Yesterday, BP said it will appoint a team of independent, external auditors to examine the company's trading compliance and share the results of the audit with investigators. Finally, BP said it will appoint an independent advisory board to help guide BP America, the company's U.S. unit, and its new CEO, Robert Malone.