That forensics paper is from 1991 and I don't have access to it. But from the paper's abstract and the autopsy findings, it seems legit to me. Also, holy shit.

If it's concentrated enough, Fentanyl can kill you in minutes even if you touch it. That's why some police now carry injectors to fix a Fentanyl overdose. They may not even see it, and it's enough to kill them.

Rumor has it that lots of concentrated Fentanyl coming from China via California ports. Those ports are controlled by the CCP, so is the security. Investigate California ports.