A former Delaware judge has been appointed to determine whether Orexo AB violated a protective order from previous litigation in order to accuse generic drugmaker Actavis Elizabeth of infringing two patents for its opioid treatment drugs.

On Tuesday, U.S. District Judge Gregory M. Sleet of the District of Delaware said that retired Superior Court Judge Charles H. Toliver IV would act as special master in the case, tasked with addressing Actavis’ allegations that Orexo had used confidential information to build its case seeking to boot Actavis’ generic versions of Suboxone and Subutex from the market.