United Microelectronics Corp., the Taiwanese semiconductor maker charged by the U.S. Justice Department with conspiring to steal trade secrets from a U.S. rival, Micron Technology, has brought on the former head of the U.S. Department of Justice Criminal Division to defend it in the case.

Former Assistant Attorney General Leslie Caldwell, now a partner at Latham & Watkins, made an appearance for UMC on the docket Monday. UMC’s co-defendant, Fujian Jinhua Integrated Circuit Co. Ltd., meanwhile, has brought on DOJ veteran Christine Wong, who recently joined Morrison & Foerster after a stint in-house at Fujitsu Ltd.