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Matthew Perry’s Assistant Sentenced to 41 Months in Ketamine Death Case

The sentence closes a 2½-year federal probe into an illegal ketamine supply chain.

Overview

  • Kenneth Iwamasa was sentenced to 41 months in federal prison on May 27, 2026 for injecting Matthew Perry with multiple doses of ketamine that the Los Angeles County medical examiner found to be the primary cause of the actor’s death.
  • Iwamasa pleaded guilty in August 2024 to conspiracy to distribute ketamine resulting in death and admitted to administering repeated injections, including several on the day Perry was found unresponsive in his Pacific Palisades hot tub.
  • Prosecutors say Iwamasa obtained off‑the‑books ketamine from physician Salvador Plasencia and from intermediary Erik Fleming, who in turn sourced supply from dealer Jasveen Sangha, creating a chain of illegal distribution.
  • Sentences for the other defendants varied with role and cooperation: dealer Jasveen Sangha received 15 years, Plasencia about 30 months, Fleming two years, and Dr. Mark Chavez received home confinement and community service.
  • Family impact statements described deep betrayal by a trusted caregiver and the case has raised concerns about patient safety, off‑label ketamine use, physician responsibility, and the risks of nonmedical administration by caregivers.