Kenneth Iwamasa, Matthew Perry's Live-In Assistant, Sentenced to 41 Months Over Actor's Fatal Ketamine overdose

Kenneth Iwamasa, who served as Matthew Perry's live-in personal assistant, received a 41-month federal prison sentence on 28 May 2026 for his role in providing the actor with ketamine in the weeks leading to his death in October 2023. The sentence, delivered by U.S. District Judge John C. Matherly in Los Angeles, brings to a close a multi-year prosecution that resulted in five convictions connected to the actor's fatal overdose.

The sentencing caps a process that began when Perry was found unresponsive in his Pacific Palisades hot tub on 28 October 2023. The actor, who had spoken publicly about his struggles with addiction and was best known for his decade-long role as Chandler Bing on the sitcom Friends, died from the acute effects of ketamine, a dissociative anesthetic that had been administered to him in increasing quantities over the preceding month. Authorities determined that the ketamine in his system was not administered in a clinical setting.

A Pattern of Facilitation

Court documents and prosecutors' sentencing memos outline a sustained pattern in which Iwamasa both administered ketamine to Perry and sourced the drug from associates who had obtained it through falsified prescriptions and fraudulent medical practices. According to the U.S. Department of Justice filing, Iwamasa injected the actor with ketamine on at least a dozen occasions in the weeks before his death, acting on instructions from Perry but without medical oversight.

The prosecution argued that Iwamasa's role was not that of a passive assistant carrying out orders but of an active intermediary who maintained the supply chain and managed the logistics of obtaining and distributing the drug. Defense attorneys contended that Iwamasa had acted under Perry's direction and had not intended to cause harm, seeking a sentence below the sentencing guidelines' range of 57 to 71 months.

Judge Matherly imposed a sentence below the guidelines range but rejected the defense request for time served, stating that Iwamasa's position of trust carried weight in the determination. "You were in a position of care," the judge said from the bench, according to reporting from the courtroom.

A Broader Network, A Smaller Role

Iwamasa's sentencing follows those of four other defendants convicted in connection with Perry's death. Dr. Salvador Plasencia, the physician who wrote many of the falsified ketamine prescriptions, received a 30-month sentence in February 2026 after pleading guilty to conspiracy and ketamine distribution charges. Jasleen Sangha, a licensed pharmacist who distributed the drug through her clinic, was sentenced to 10 months. Two associates — Erik De Venture and Brandon Pate — received shorter sentences for their roles in brokering and delivering the substances.

The sentencing of five defendants in a case involving a single deceased user is unusual but not without precedent in federal drug-trafficking prosecutions. In this instance, prosecutors argued that the scale of the operation — including伪造 medical records and a coordinated supply network — warranted separate charges for each participant. The Department of Justice noted at the time of the first convictions that the case was intended to send a signal about accountability in cases where medical professionals facilitate substance abuse by high-profile individuals.

What the Case Does and Does Not Settle

The 41-month sentence closes the criminal dimension of a case that dominated entertainment news cycles in late 2023 and early 2024. It does not fully resolve the questions about how ketamine, a controlled substance with limited approved medical uses, became repeatedly accessible to Perry in the weeks before his death, or why the medical professionals involved did not flag concerns about the dosages being administered.

The actors's death was ruled accidental by the Los Angeles County Medical Examiner-Coroner, with ketamine intoxication listed as the primary cause. The manner of death was recorded as undetermined, reflecting uncertainty about whether Perry administered the drug to himself, received it from Iwamasa, or some combination of both. The court record reflects ongoing factual dispute about the precise sequence of drug administration on the morning of 28 October 2023.

A Legacy Reconsidered

Matthew Perry was 54 years old at the time of his death and had spent much of his public life discussing addiction and recovery with a candor that made him unusual among celebrities. His memoir, published in 2022, described decades of substance use and repeated rehabilitation attempts. The criminal case did not alter that public understanding but added a new layer of detail about the final weeks of his life.

The sentencing of his former assistant — a figure who occupied a private and intimate role in Perry's daily life — brings the legal process to a close while leaving intact questions about the medical and social ecosystems that surrounded high-profile individuals with substance use disorders. Prosecutors noted in their sentencing memorandum that the case demonstrated how trust, when weaponized, can accelerate the very harms that treatment is meant to prevent.

This publication covered the Perry sentencing through wire reports, noting the narrower focus of the court record compared with contemporaneous speculation about the actor's final weeks.