NEW YORK - Bankrupt Residential Capital LLC (ResCap) on Sept. 4 filed a brief in the U.S. Bankruptcy Court for the Southern District of New York contending that a $10 billion claim filed by a real estate investor in connection with a residential mortgage serviced by ResCap's affiliate GMAC Mortgage (GMACM) should be expunged (In Re: Residential Capital LLC, No. 12-12020, Chapter 11, S.D. N.Y. Bkcy.).