Non-fentanyl-derived synthetic opioids emerging during recent years Posted on May 23, 2022May 23, 2022 By Becky Carter Koutaro Hasegawa,corresponding author Kayoko Minakata, Masako Suzuki, and Osamu Suzuki Forensic Toxicol; 2022 Access article Crime Scene Investigation and Reconstruction, DREs / Traffic Safety Resource Prosecutors, Forensic Pathology and Medicolegal Death Investigation, Seized Drugs/Controlled Substances, Toxicology