For the second time in a month, the judge in a fraudulent-concealment case against BASF and law firm Cahill, Gordon & Reindel is hearing grumbling over his choice of discovery special master.

Lawyers for Cahill Gordon and BASF asked Chief U.S. Judge Jose Linares on Aug. 8 to select a different special master based on alleged conflicts of interest surrounding the appointment of former Supreme Court Justice Roberto Rivera-Soto. But Rivera-Soto wrote to Linares on Aug. 11 to say the issues raised do not impair his ability to serve as special master.