
The Wall Street Journal carries an article which is only available in full with a paid subscription. The free preview gives you the idea:
"U.S. investment bank Lehman Brothers Inc. appears to have been a victim of a fraud in which swindlers used forged documents from one of Japan's biggest trading companies to bilk it out of as much as $250 million"
This Japanese article says that the medical consulting company mentioned in the WSJ used forged documents from Marubeni to secure funding of 32 billion yen from a syndicate of overseas investment banks. The company was raising funds on the premise that it was investing in some private Japanese hospitals which have fallen on hard times with the aim of turning them around. Two Marubeni employees are said to have acted without the firm's authorization in the affair. Both Marubeni and Lehmans have taken the matter to the police and there are no clear details about whether any money is recoverable or who will be on the hook if there are losses.