Most law firms are wary of suing lawyers. Diamond McCarthy is not one of them.

The Texas-based litigation shop has been hired by Dewey & LeBoeuf’s liquidation trustee, Alan Jacobs, to pursue claims against former partners from the now-defunct firm, according to court filings made last week. The role is a familiar one for Diamond McCarthy, which is currently filling trustee roles in the Chapter 11 bankruptcies of Washington, D.C., litigation firm Howrey and convicted Ponzi schemer Marc Dreier’s defunct Dreier LLP.