Kenneth Iwamasa, the live-in personal assistant who injected Matthew Perry with the ketamine dose that killed him, was sentenced Wednesday to three years and five months in federal prison, closing the final chapter of a criminal investigation that exposed a network of enablers surrounding the beloved actor in his last days.

Iwamasa, 60, was the last of five defendants to face sentencing in the case. A federal judge in Los Angeles ordered him to serve 41 months behind bars and pay a $10,000 fine for conspiring to distribute ketamine to Perry, who died on October 28, 2023, at age 54. Ketamine was ruled the primary cause of death.

A betrayal measured in needle marks

The scope of Iwamasa's conduct went far beyond a single fatal injection. Between October 24 and October 27, 2023, Iwamasa injected Perry with ketamine six to eight times daily, Fox News reported. He obtained the drug and repeatedly administered it while Perry's addiction spiraled out of control in those final days.

Iwamasa was the last person to see Perry alive. He later found the actor dead in his hot tub at his Pacific Palisades home. The assistant had been paid $150,000 annually and was a constant presence at Perry's side, according to AP News.

U.S. District Judge Sherilyn Peace Garnett did not mince words at sentencing, as CBS News Los Angeles reported:

"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."

Family confronts the man they trusted most

Perry's relatives delivered searing victim impact statements that laid bare the depth of their anger toward a man they had trusted to protect the actor from the very thing that killed him.

Suzanne Morrison, Perry's mother, told the court that Iwamasa had one overriding duty. She stated:

"Kenny's most important job, by far, was to be my son's companion and guardian in his fight against addiction. His number-one responsibility: ensure that Matthew remained what he wanted to be: drug free."

Instead, Iwamasa became the person who fed Perry's addiction and wielded the syringe. Perry's family has said they blame Iwamasa more than anyone else among the five defendants for the actor's death.

Perry's sister, Madeline Morrison, described the sentencing process as reopening a wound that had never fully closed. She told the court:

"In many ways, it felt like my brother died all over again. Everything I believed about the day he died, everything Kenny told us, was a lie."

Lisa Ferguson, Perry's business manager and estate executor, was even more direct in her assessment of Iwamasa's role. She addressed him in court and said: "What you are is the monster that killed him."

A stepfather's fury

Keith Morrison, Perry's stepfather and a well-known television journalist, zeroed in on what he saw as the cold calculation behind Iwamasa's silence during the crisis. Newsmax reported Morrison's words to Iwamasa:

"You did the injections. You could have made the phone call. But you didn't. Because you were living a dandy life."

That statement captures the prosecution's theory of the case in miniature. Iwamasa had every opportunity to intervene, to call for help, or to refuse to keep injecting a man clearly in danger. He chose not to, and the family believes the comfortable lifestyle Perry's salary afforded him was reason enough to stay quiet.

The sentencing echoes other recent cases where trusted insiders exploited vulnerable people with lethal results. In one high-profile Utah case, a children's book author was sentenced to life without parole for poisoning her husband with fentanyl, a reminder that betrayal by those closest to the victim often carries the heaviest moral weight in the courtroom.

Five defendants, five sentences

Iwamasa's sentencing closes a sprawling investigation that ultimately ensnared five people in Perry's orbit. All five pleaded guilty to charges related to supplying or distributing the ketamine that killed him. Iwamasa was the last to be sentenced, and his 41-month term reflects what prosecutors characterized as his central role in the conspiracy.

Among those previously sentenced was Jasveen Sangha, who received 15 years in federal prison for supplying the ketamine that ultimately ended Perry's life. The range of sentences across the five defendants reflects the varying degrees of culpability prosecutors identified in the distribution chain.

Breitbart noted that the sentencing concludes the legal proceedings stemming from Perry's death, a case that drew intense public attention both because of Perry's fame and because of the unusual number of people charged in connection with a single overdose death.

What the case revealed

Perry's death initially appeared to be a tragic but private overdose. The federal investigation that followed peeled back layers of enablement that shocked even veteran prosecutors. A personal assistant turned drug injector. A supplier willing to sell lethal quantities. A network of people who saw a man in crisis and chose profit or convenience over his life.

Perry had been open about his struggles with addiction for years, discussing them publicly in his memoir and in interviews. His family's statements at sentencing made clear that they believed Iwamasa exploited that vulnerability rather than guarding against it.

The case also raises uncomfortable questions about accountability structures around celebrities struggling with substance abuse. Iwamasa was not a medical professional. He had no training in administering injections. Yet he injected a powerful dissociative anesthetic into Perry's body multiple times a day for at least four consecutive days before the actor died.

Authorities have not publicly addressed whether any systemic changes in how personal staff interact with high-risk individuals might follow from the investigation's findings.

A sentence that satisfies no one

At 41 months, Iwamasa's sentence falls well short of what Perry's family clearly wanted. The raw emotion in the courtroom, the words "monster" and "lie" and "dandy life" directed at a man who once held a position of intimate trust, suggests a family that views three and a half years as inadequate for the role Iwamasa played.

Federal sentencing guidelines, plea agreements, and cooperation considerations all constrain what judges can impose. Judge Garnett's remarks made clear she found Iwamasa's conduct reckless and sustained, not a single lapse in judgment but a pattern of dangerous behavior over multiple days.

Perry was 54 when he died. He had survived decades of addiction struggles, built a career that brought joy to millions, and was, by his family's account, trying to stay clean. The man hired to help him do exactly that instead put a needle in his arm, over and over, until it killed him.

When the people paid to protect someone become the ones who destroy him, no prison term will feel like enough. But the law did what it could, and five people now carry federal convictions for their part in ending Matthew Perry's life.