A federal grand jury has indicted an Oklahoma City man on allegations that he distributed a synthetic opioid analogue that resulted in another person's death.
Prosecutors say 37-year-old Collin Shane Kirby distributed a substance containing N-Propionitrile Chlorphine, also known as cychlorphine, on Dec. 12, 2025.
According to the indictment, the individual who received the substance later died after using it. The indictment was unsealed this week, and the case is being prosecuted in federal court.
What the federal indictment alleges
The U.S. Attorney's Office said Kirby is charged with distributing a controlled substance analogue resulting in death. If convicted, he faces a mandatory minimum sentence of 20 years in federal prison and could receive a life sentence, along with a fine of up to $1 million.
The case stems from an investigation by the Drug Enforcement Administration and the Oklahoma Bureau of Narcotics and Dangerous Drugs. Assistant U.S. Attorney Elizabeth Joynes is prosecuting the case.
FAQ
What is cychlorphine?
Cychlorphine, also known as N-Propionitrile Chlorphine, is a synthetic opioid. Federal prosecutors allege it was the substance involved in this case.
What is a controlled substance analogue?
A controlled substance analogue is a substance that is chemically similar to an illegal drug and can be treated as a controlled substance under federal law if certain legal requirements are met.
Who investigated the case?
According to the U.S. Attorney's Office, the investigation was conducted by the Drug Enforcement Administration and the Oklahoma Bureau of Narcotics and Dangerous Drugs.