Kenneth Iwamasa Sentenced to 41 Months in Prison in Ketamine Death of Matthew Perry

The final sentencing in the case closes a 2½‑year investigation into the tragic overdose of the beloved actor.

Kenneth Iwamasa, Matthew Perry’s longtime live‑in personal assistant, was sentenced on May 27, 2026, to three years and five months (41 months) in federal prison for conspiring to distribute ketamine that led to the actor’s death. His sentence, which includes a $10,000 fine and two years of probation, marks the conclusion of a sprawling investigation that involved five defendants. Victim impact statements from Perry’s family underscored the deep betrayal they felt, as Iwamasa, once a trusted friend, facilitated and administered the fatal drug.

A Final Chapter to a Long Investigation

On May 27, 2026, Kenneth Iwamasa—Matthew Perry’s live‑in personal assistant—was sentenced to 41 months in federal prison for his role in the actor’s fatal ketamine overdose on October 28, 2023. The sentence, handed down by U.S. District Judge Sherilyn Peace Garnett in Los Angeles, also includes two years of probation and a $10,000 fine . Iwamasa had pleaded guilty in August 2024 to one count of conspiracy to distribute ketamine resulting in death and serious bodily injury .

From Trusted Aide to Enabler

Iwamasa, who had known Perry since the early 1990s and became his personal assistant in 2022, was entrusted to support the actor’s sobriety. Instead, prosecutors reveal he became deeply involved in supplying and administering ketamine—injecting Perry six to eight times per day in the final days of his life . Court documents recount that he purchased 51 vials of ketamine over 11 days from a dealer, Erik Fleming, who sourced from Jasveen Sangha, the so-called 'Ketamine Queen' .