Matthew Perry's Assistant Gets 41 Months for Role in Actor's Death

The final sentence in Matthew Perry’s story came down on Wednesday, May 27, when a judge sentenced Kenneth Iwamasa, the actor’s live-in personal assistant, to 41 months in prison. It marked the end of a legal reckoning that exposed not just the mechanics of a tragedy, but the human betrayal at its core.

Iwamasa pleaded guilty to conspiracy to distribute ketamine, causing death. He was the last of five defendants to learn his punishment—and arguably the one whose guilt cuts deepest. He wasn’t a distant dealer or middleman. He was in Perry’s home. He had access. He had responsibility. On October 28, 2023, Iwamasa repeatedly injected Perry with ketamine without any medical training. Hours later, Perry, just 54 years old, was found dead in his jacuzzi. The Los Angeles County Medical Examiner ruled it an accident caused by the acute effects of ketamine, though drowning, coronary artery disease, and buprenorphine (used to treat opioid dependency) also contributed.

Before sentencing, Perry’s mother, Suzanne Morrison, submitted a victim impact statement that crystallized the sting of what happened:“His number one responsibility was to ensure that Matthew remained what he wanted to be: drug-free. But instead of protecting Matthew, he aided and abetted illegal drug use, arranged for one source of supply and then another.”Perry’s sisters, Caitlin and Madeline Morrison, wrote their own statements. Madeline described the betrayal in raw terms:“In many ways, it felt like my brother died all over again.”Caitlin raised a haunting question:“I will never know if the lethal dose of ketamine was only lethal by accident. But I know that when Kenny left the house, he was doing one of two things. He was either escaping from something he knew he had done or he was willfully abandoning a vulnerable person in a dangerous situation.”

The judge, before handing down the sentence, acknowledged what made Iwamasa’s crime so damning.“You were privy to his struggle with addiction. Your conduct was reckless, not just on the day of his death but in the days leading up to his death.”Iwamasa must surrender to authorities by July 17 to begin serving his sentence. He was also ordered to complete two years of probation and pay a $10,000 fine.

This case stands as a stark reminder that addiction doesn’t exist in isolation. It thrives in systems—in supply chains, in enabling, in the choices of people close enough to help but who choose differently. Perry’s death wasn’t just a tragedy of substance use; it was a tragedy of trust broken and responsibility abandoned.