U.S. Bankruptcy Court Judge James M. Peck has appointed Anton “Tony” Valukas as an examiner to investigate potential creditor claims in the Lehman Brothers Holdings Inc. Chapter 11 proceedings after a number of claimants sought the appointment.

Peck, who is a judge in the U.S. Bankruptcy Court for the Southern District of New York, where the bankruptcy of the former investment bank is unfolding, named Valukas on Tuesday after last week issuing an order that an examiner would be named. In re Lehman Brothers Holdings Inc., No. 08-13555. Valukas is a criminal defense attorney in Chicago and has been a partner with Jenner & Block since 1976, except during the period he served as a U.S. attorney in the city from 1986 to 1990.

The examiner was named after the request for such an appointment was made in October by The Walt Disney Co., a creditor in the bankruptcy, and joined by other creditors, including Harbert Management Corp. Funds and Bank of America. The examiner is charged with investigating, among other things, whether Lehman Brothers Commercial Corp. or other subsidiaries, have claims against their parent company, Lehman Brothers Holdings, or its officers or directors.