FILE - DEA Administrator Anne Milgram speaks at a news conference in Los Angeles on Thursday, Aug. 15, 2024, regarding Matthew Perry's death. (AP Photo/Damian Dovarganes, File)

FILE - A bag of 4-fluoro isobutyryl fentanyl which was seized in a drug raid is displayed at the Drug Enforcement Administration (DEA) Special Testing and Research Laboratory in Sterling, Va., on Aug. 9, 2016. (AP Photo/Cliff Owen, File)