Feds seek Bulger girlfriend's assets BOSTON, March 22 (UPI) -- Federal prosecutors say they are trying to identify any assets belonging to Catherine Greig, the longtime girlfriend of Boston mobster James "Whitey" Bulger. Greig and Bulger were arrested last year in California, where they had lived for years under assumed names. Greig, 60, pleaded guilty last week to identity fraud. Prosecutors said Wednesday that Greig could be fined more than $850,000, the Boston Herald reported. They are seeking the judge's permission to seize a house Greig owns in Quincy, Mass., and her twin sister's house in South Boston if necessary. The sister, Margaret McCusker, has been intimately involved in Greig's finances, prosecutors said. McCusker transferred almost $135,000 in Greig's account to an account at another bank after the arrests, although $20,000 has been withdrawn, the newspaper reported. Bulger, who avoided criminal charges for a long time by serving as an FBI informant against rivals, faces a list of charges that includes multiple murders.