(May 31, 2017, 1:56 PM EDT) -- DETROIT — A federal bankruptcy judge in Michigan on May 25 ruled that the U.S. Bankruptcy Code does not prevent a law firm from representing multiple hydraulic fracturing drilling and equipment companies in their Chapter 11 proceeding despite the possibility that the firm may have received a preferential transfer from the debtors 90 days before the filing of their petition (In re: HardRock HDD Inc., No. 17-46425, Chapter 11, E.D. Mich. Bkcy; 2017 Bankr. LEXIS 1418)....