Judge Sherilyn Peace Garnett sentenced Matthew Perry’s former live-in assistant, Kenneth Iwamasa, to 41 months in jail for distributing the ketamine that caused the star’s death.
Iwamasa pleaded guilty in August 2024 to conspiracy to distribute ketamine causing death, according to The Los Angeles Times. He admitted to repeatedly injecting the “Friends” star with ketamine, including multiple injections on the day he died — October 23, 2023. Iwamasa did not have any medical training. Perry’s family told the court they trusted Iwamasa to care for Perry, who had a long history of addiction struggles.
Iwamasa is the last person to be sentenced in relation to Perry’s death.
Kenneth Iwamasa is facing years in prison for being the middleman between drug dealers and Matthew. Prosecutors claim he also injected the actor with ketamine, including on the night he died in 2023. pic.twitter.com/nWhJU6HUAi
— TMZ (@TMZ) May 27, 2026
Iwamasa was also sentenced to two years of probation and a $10,000 fine, according to Global News.
The Los Angeles Times reported that Iwamasa was paid $150,000 a year, resided with Perry, and was treated like family prior to the actor’s death.
Prosecutors accused him of injecting Perry with powerful ketamine doses and alleged he ignored warning signs before the actor passed away from acute effects of the drug. They alleged that Iwamasa also attempted to destroy and conceal evidence after Perry was found dead in the hot tub of his Pacific Palisades home.
LOS ANGELES, CA – DECEMBER 09: Actor Matthew Perry at the after party for the FX Network’s premiere screening of “Dirt” at Republic on December 9, 2006 in Los Angeles, California. (Photo by Charley Gallay/Getty Images)
Four of his co-defendants were previously sentenced for their roles in the beloved actor’s death.
Jasveen Sangha, known as the “ketamine queen,” was sentenced to 15 years in prison for supplying the ketamine that caused Perry’s death. Dr. Salvador Plasencia was sentenced to 30 months in federal prison and two years of supervised release for illegally distributing ketamine. (RELATED: REPORT: Matthew Perry’s Ex-Assistant Allegedly Attempted To Conceal Ketamine Trail After Star’s Death)
Erik Fleming was sentenced to two years after confessing to one count of distributing ketamine leading to death, and Dr. Mark Chavez, one of the physicians implicated in supplying ketamine to Perry, was sentenced to eight months of house arrest and three years of supervised release.