Ketamine Plot: Perry’s Assistant Sentenced

Bundles of cash next to bags of white powder on a wooden surface — KETAMINE PLOT BOMBSHELL

The man paid $150,000 a year to protect Matthew Perry’s wellbeing was the one who injected him with the dose of ketamine that killed him.

Story Snapshot

Kenneth Iwamasa, Perry’s live-in personal assistant, was sentenced to 41 months in federal prison on May 27, 2026.
Iwamasa pleaded guilty in August 2024 to conspiracy to distribute ketamine resulting in death and serious bodily injury.
Prosecutors say he obtained ketamine and injected Perry multiple times per day, administering the fatal dose himself.
Iwamasa is the last of several defendants sentenced in connection with Perry’s October 2023 death.

The Man Closest to Perry Became the Most Dangerous Person in His Life

Kenneth Iwamasa was not a drug dealer operating in the shadows. He was a trusted employee, a daily presence in Matthew Perry’s home, someone Perry relied on for the basic logistics of living.

That proximity, which should have made Perry safer, became the mechanism of his death. The Department of Justice confirmed Iwamasa was sentenced for obtaining and repeatedly injecting Perry with ketamine, including the fatal dose that ended the actor’s life.

Matthew Perry’s Assistant Gets More than 3 Years in Prison for Injecting Actor with Ketamine on Day He Died https://t.co/Wy2fnJ5CX4

— People (@people) May 27, 2026

Iwamasa earned $150,000 annually working for Perry, according to the Los Angeles Times. ^[5] That is not assistant money. That is confident money. It buys loyalty, discretion, and access. In this case, it also bought silence around a drug administration routine that prosecutors say involved multiple ketamine injections per day.

The financial relationship matters because it entirely reframes the dynamic. This was not a friend helping a friend. This was an employee whose continued income depended on keeping his employer satisfied, regardless of the cost.

A Guilty Plea That Left No Room for Ambiguity

Iwamasa pleaded guilty in August 2024 to one count of conspiracy to distribute ketamine resulting in death and serious bodily injury. ^[2] That specific charge carries enormous legal weight. It does not merely say he was present or that he enabled someone else.

It says the distribution he participated in caused a death. Federal prosecutors do not attach that language loosely. The plea itself is a confession to a causal chain that runs directly from Iwamasa’s hands to Perry’s death.

The sentencing took place on May 27, 2026, with the court handing down 41 months in federal prison. ^[1] Perry’s mother, Suzanne Morrison, and stepfather, journalist Keith Morrison, attended the final hearing. Their presence signals something important.

This was not a case the family quietly accepted. They showed up for every accountability moment, and this was the last one. The criminal case that began with Perry’s death in October 2023 formally closed with this sentencing.

How a Ketamine Conspiracy Requires More Than One Person

The word conspiracy in the charge is doing serious work. Iwamasa did not act alone. The broader investigation identified a network that included a physician and a ketamine supplier, each playing a role in getting the drug to Perry and keeping that supply moving. ^[2]

Iwamasa was the last link in that chain, the person who translated supply into administration. In drug-related death prosecutions, courts look at the full distribution network, not just the final actor. That is why multiple people faced charges in this case.

The final sentencing in connection with the ketamine overdose death of "Friends" star Matthew Perry took place Wednesday when the actor's former live-in personal assistant was sentenced in Los Angeles to prison as part of a plea agreement. https://t.co/T7u9KMFe99

— NBC 7 San Diego (@nbcsandiego) May 28, 2026

What makes Iwamasa’s role distinctly troubling is not just legal, but moral. A physician prescribing recklessly is a professional failure. A supplier moving product is a criminal enterprise.

But an assistant who injects his employer with a dangerous anesthetic multiple times a day, watches the dependency deepen, and keeps showing up with the needle represents something harder to categorize. It is a betrayal dressed as service.

The case here is to hold individuals accountable for their direct actions rather than diffuse blame across systems is exactly right here. Iwamasa made choices. The sentence reflects that.

What 41 Months Actually Means for Cases Like This

Three years and five months is not a life sentence. For a man who administered the fatal injection to one of the most recognized television actors of his generation, some will argue the punishment does not match the gravity of the act. That is a legitimate question.

Federal sentencing guidelines account for cooperation, plea agreements, and the structure of conspiracy charges, all of which can significantly reduce the time served.

Whether the outcome feels proportionate depends entirely on whether you believe the legal framework adequately captures what actually happened in Perry’s home.

Perry’s death at 54 closed a story that millions of people followed across a decade of must-see television. The criminal case that followed his passing revealed something far darker than a celebrity struggling with addiction.

It exposed a support system that had rotted from within, in which the person closest to him was accelerating his destruction, one injection at a time.

The courts have now spoken on every defendant in that network. The accountability chapter is finished. Whether it was enough is a question Perry’s family will carry long after Iwamasa’s sentence is served. ^[1]^[2]