Kenneth Iwamasa wasn't a doctor. He didn't have a medical license, he didn't have formal training, and he certainly didn't have a clue how to handle a massive overdose. Yet, in the final weeks of Matthew Perry's life, the live-in personal assistant became a full-time, unlicensed anesthesiologist. He injected the Friends star with liquid ketamine up to eight times a day. He injected him on the day he died. He even took the needle to Perry's arm one last time after the actor reportedly told him, "Shoot me up with a big one."
The federal investigation into Perry's October 2023 death concludes with Iwamasa standing in a Los Angeles federal courtroom. He faces Judge Sherilyn Peace Garnett for his final sentencing. Prosecutors are asking for three years and five months in prison. For a family that trusted this man to keep their son and brother sober, no amount of time feels like enough. Also making news recently: Why India is Quietly Stopping Bollywood from Bashing China.
This case isn't just about a tragic celebrity relapse. It exposes the grim reality of the Hollywood enablement machine, where assistants transform into accomplices and vulnerable addicts are treated as walking ATMs by the people paid to protect them.
The Illusion of Protection
When Matthew Perry hired Iwamasa in 2022, his family breathed a sigh of relief. Perry’s decades-long battle with severe substance abuse was public knowledge. He wrote about it extensively in his memoir. He spent millions of dollars trying to get clean. His mother, Suzanne Morrison, and his sisters trusted Iwamasa to be the ultimate buffer between Perry and his demons. Additional insights on this are covered by IGN.
Instead, the assistant became a enabler.
Court documents paint a terrifying picture of the power dynamic inside Perry’s Toluca Lake home. As Perry’s cravings grew, he moved past the legal, off-label ketamine treatments he received from legitimate doctors for depression. He wanted more. He wanted it faster. Iwamasa didn't say no. According to his defense attorneys, Iwamasa was caught in an aggressive employment dynamic where he "could not simply say no" to his famous boss.
That excuse falls flat when you look at the sheer volume of drugs flowing into the house. Iwamasa spent thousands of dollars in cash to secure dozens of vials of liquid ketamine. He watched Dr. Salvador Plasencia—nicknamed "Dr. P"—inject Perry in the back of a car in a public parking lot. He then took the vials home and started doing the injections himself, completely aware that Perry was sliding into a dangerous spiral.
A Web of Enabling and Profit
Iwamasa was just one cog in a highly organized, predatory network that viewed Perry's addiction as a massive payday. The federal investigation eventually took down five people, exposing how deeply entrenched this supply chain really was.
- Jasveen Sangha (The "Ketamine Queen"): Operating a high-volume drug house out of North Hollywood, Sangha catered directly to wealthy, high-profile clients. She supplied the exact batch of ketamine that ended Perry’s life. She was sentenced to 15 years in federal prison.
- Erik Fleming: A former acquaintance of Perry who acted as the middleman, brokering the cash deal between Iwamasa and Sangha. He delivered 51 vials of ketamine to Perry’s house and was sentenced to two years in prison.
- Dr. Salvador Plasencia: A licensed physician who saw Perry’s desperation as an easy cash grab. He openly mocked the actor in text messages, writing, "I wonder how much this idiot will pay." He surrendered his medical license and received a two-and-a-half-year prison sentence.
- Dr. Mark Chavez: Another physician who operated a legitimate ketamine clinic but channeled the drugs to Plasencia through fraudulent prescriptions. He surrendered his medical license and received probation and home confinement after cooperating extensively.
While the doctors and dealers supplied the ammunition, Iwamasa was the one who pulled the trigger. He wasn't just buying the drugs; he was actively administering them to an unconscious or heavily impaired man, then leaving him unattended near a hot tub.
The Cruel Aftermath and Family Betrayal
The emotional destruction left behind is staggering. Victim impact statements submitted by Perry’s family detail an agonizing level of betrayal that went far beyond the physical act of injecting the drugs.
Perry’s sister, Madeline Morrison, recalled the frantic days right after the actor passed away. She described how Iwamasa seemed manic, repeatedly volunteering his own clean version of events without being asked. He was actively weaving a cover story to hide the fact that he had administered three separate shots of ketamine on the day Perry died, before leaving the house to run errands.
Worse, Iwamasa actually spoke at Perry’s funeral. He stood in front of a room full of grieving family members and friends, pretending to mourn a man he had helped kill just days prior.
Caitlin Morrison, another of Perry’s sisters, expressed zero sympathy for the assistant in her letter to the judge. She noted that when Iwamasa left the house that afternoon, he was either fleeing the scene of a crime he knew he committed or willfully abandoning a completely helpless person in an incredibly dangerous environment.
Moving Forward From the Hollywood Trap
If you are managing a loved one’s recovery or working within an environment where power dynamics obscure right from wrong, you cannot rely on unspoken agreements or blind trust. True accountability requires independent oversight.
- Establish independent medical oversight: Never allow an employee, assistant, or family member to handle or administer specialized medication without strict, verified professional supervision.
- Set up a clear escape hatch: If you are an employee in a situation where you feel pressured to break the law or enable dangerous behavior for a boss, seek outside legal counsel immediately. Keeping a job is never worth a life.
- Look for behavioral red flags: Sudden isolation, large unexplained cash withdrawals, and an influx of new, shady "friends" or unconventional medical professionals are immediate warning signs that a relapse is being actively funded and enabled.
The sentencing of Kenneth Iwamasa closes a dark legal chapter, but the systemic culture that allowed Matthew Perry to be exploited remains entirely intact. True protection for vulnerable individuals requires shattering the wall of secrecy that personal assistants and crooked professionals use to hide their crimes.
