Calgary man charged with manslaughter after teen girl dies of drug overdose

A Calgary man has been charged with manslaughter in connection with the drug overdose death of a 16-year-old girl. The incident, which occurred in November 2025, involved the potent synthetic opioid carfentanil.

Police allege that on November 27, 2025, two 16-year-old girls met an acquaintance in downtown Calgary and later went to a residence in the 8300 block of Centre Street N.E., where drugs were believed to have been consumed. The following morning, the homeowner discovered one of the girls unconscious and called 911.

Emergency responders were unable to revive the girl, identified as Jordynn Atkins Materi. An autopsy later determined that the cause of death was the toxic effects of carfentanil, a substance up to 100 times stronger than fentanyl and legally restricted in Canada to sedating large animals.

Following an investigation by the Calgary Police Service's Drug Investigations for Safer Communities team, Steve Phillip Gilbert Collins, 40, was arrested on June 25, 2026. He is charged with one count of manslaughter and is scheduled to appear in court on July 6, 2026. Police noted this is the first time they have laid a manslaughter charge in relation to an overdose death. The announcement coincided with the UN's International Day Against Drug Abuse & Illicit Trafficking.

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A man has been charged with manslaughter following a drug-related death that occurred in northeast Calgary in November 2025.