What happened in the Matthew Perry ketamine case

Most people remember only the first chapter: Matthew Perry died in October 2023, the medical examiner said ketamine was the primary cause, and then coverage seemed to drift away. But federal prosecutors later described something much broader. In August 2024, the U.S. Attorney's Office said five defendants had been charged in connection with Perry's fatal ketamine supply chain, including two physicians, Perry's live-in assistant Kenneth Iwamasa, an intermediary named Erik Fleming, and alleged dealer Jasveen Sangha, the so-called Ketamine Queen.

The key thing people miss is that prosecutors did not frame this as one rogue prescription. They described a supply network. Court filings said Iwamasa admitted repeatedly injecting Perry, including on the day Perry died. Fleming admitted distributing ketamine that had been obtained from Sangha. Prosecutors also alleged that physician Salvador Plasencia and physician Mark Chavez used medical access to obtain and sell ketamine outside legitimate treatment. One of the ugliest details in the case was a message attributed to Plasencia asking how much this moron would pay, which prosecutors used to argue the defendants saw Perry as a profit opportunity rather than a patient.

The outcome has come in waves, not one clean verdict. Plasencia was sentenced in December 2025 to 30 months in federal prison. Chavez was sentenced later that month to home confinement, supervised release, and community service. DOJ reporting at the end of 2025 said Iwamasa, Fleming, and Sangha were still awaiting sentencing, and newer ABC reporting indicated at least some of those hearings had slipped into April 2026. That staggered rollout is exactly why the case feels unfinished to the public even though major parts of it have already been resolved.

The larger significance is that this was not just an overdose story. It became a story about a celebrity's addiction being monetized by a chain of suppliers, including licensed professionals, and about how slowly those consequences have unfolded in court.