Matthew Perry's Personal Assistant Sentenced to Over Three Years in Prison

On October 28, 2023, Kenneth Iwamasa injected Matthew Perry with at least three doses of ketamine in the actor's Pacific Palisades home. Perry's last words to Iwamasa were "Shoot me up with a big one" [1]. Iwamasa complied, then left to run errands. When he returned, the 54-year-old star of Friends was dead in his jacuzzi.

On May 27, 2026, U.S. District Judge Sherilyn Peace Garnett sentenced Iwamasa to 41 months in federal prison, a $10,000 fine, and two years of supervised release [2]. He was the fifth and final defendant sentenced in a two-and-a-half-year federal investigation that traced Perry's ketamine supply from a North Hollywood drug dealer through a middleman, two physicians, and ultimately to Iwamasa's untrained hands.

The Supply Chain: Five Defendants, Five Sentences

The federal prosecution mapped a conspiracy with distinct roles at each level.

Jasveen Sangha, a North Hollywood woman known among associates as the "Ketamine Queen," operated a drug distribution network from her home for years [3]. In October 2023, she sold 51 vials of ketamine that were provided to Perry through intermediaries. Prosecutors also tied her to the 2019 ketamine overdose death of another customer, Cody McLaury, alleging she knew her product had caused his death but continued dealing [3]. On April 8, 2026, Sangha was sentenced to 15 years in prison after pleading guilty to five federal charges, including distribution of ketamine resulting in death [4].

Erik Fleming, a drug counselor who acted as the middleman between Sangha and Perry's circle, was sentenced to two years in prison [5].

Dr. Salvador Plasencia, a Santa Monica physician, sold Perry 20 vials of ketamine along with lozenges and syringes. In text messages to a colleague, he wrote: "I wonder how much this moron will pay" and "Let's find out" [6]. He charged Perry approximately $57,000 for ketamine that carried a market price of roughly $15 per vial [7]. Plasencia was sentenced to 30 months in prison in December 2025 [8].

Dr. Mark Chavez, who sold ketamine to Plasencia for resale to Perry, received the lightest punishment: eight months of home detention and three years of supervised release [5].

Kenneth Iwamasa, who administered the injections, received 41 months — the second-longest prison sentence after Sangha [2].

Source: U.S. Department of Justice

Data as of May 27, 2026CSV

What Iwamasa Did

Iwamasa, now 61, first knew Perry in 1992 and became his live-in personal assistant in 2022, earning $150,000 per year [1]. His duties included responsibilities related to Perry's medical care. Prosecutors described a role that expanded far beyond household management: he became Perry's "enabler and drug supplier," serving as drug messenger, intermediary with illegal sources, and untrained injector [9].

In the days before Perry's death, Iwamasa was injecting him six to eight times per day [1]. He administered more than 25 ketamine shots in the final days of Perry's life [10]. He had no medical training [7].

As part of his plea agreement, Iwamasa pleaded guilty to one count of conspiracy to distribute ketamine resulting in death [2]. His cooperation was described as substantial — he provided testimony that helped prosecutors build cases against the other defendants in the conspiracy.

The Power Imbalance Debate

The sentencing hearing centered on a question that extends beyond this case: how much responsibility falls on an employee of a powerful person when addiction enters the equation?

Iwamasa's attorney, Alan Eisner, argued for a six-month prison term with six months of home confinement, maintaining that Iwamasa "was always acting at the direction of a boss with much more power than he had" [10]. The defense framed Iwamasa as financially dependent on Perry and unable to refuse his employer's demands.

Judge Garnett rejected that framing directly. When Eisner said Iwamasa was "unable to act differently than he did," the judge interrupted: "Unwilling. Not unable. He could have said no" [10].

Lisa Ferguson, Perry's business manager and estate executor, offered a counter-narrative to the defense's portrait of a powerless subordinate. She told the court that Iwamasa deliberately drove out others surrounding Perry — sober-living companions, medical workers — to consolidate his own influence over the actor [10].

Perry's mother, Suzanne Morrison, said the family had been relieved when Perry hired Iwamasa. "Matthew trusted Kenny. We trusted Kenny. Kenny's most important job — by far — was to be my son's companion and guardian in his fight against addiction," she wrote [11]. "We trusted a man without a conscience, and my son paid the price."

Perry's stepfather, journalist Keith Morrison, addressed Iwamasa directly: "But you didn't [call the family] because you were living a pretty damn good life... You were living like a king" [11].

Perry's sister Caitlin Morrison wrote: "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" [11].

Perhaps most striking was the statement from Perry's half-sister, Madeline Morrison, who revealed that Iwamasa spoke at Perry's funeral. "The person responsible for my brother's death stood up and addressed the people who loved him most. That is like a cruel joke I still struggle with" [11].

Sentencing Disparities and Federal Guidelines

The range of sentences — from Chavez's eight months of home detention to Sangha's 15 years — reflects both the varying severity of each defendant's conduct and the structure of federal drug sentencing law.

Ketamine is a Schedule III controlled substance. Under 21 U.S.C. § 841(b)(1)(D), first-offense distribution carries a maximum of five years in prison. When distribution results in death or serious bodily injury, the maximum increases to 15 years [12]. For comparison, Schedule I and II drugs like heroin, fentanyl, and methamphetamine carry maximums of 40 years for distribution, with mandatory minimums of 20 years when death results [12].

Source: U.S. Sentencing Commission

Data as of May 27, 2026CSV

This means the entire sentencing framework available to prosecutors in the Perry case was substantially narrower than it would have been had Perry died from an opioid overdose. Sangha's 15-year sentence hit the statutory ceiling for ketamine distribution causing death. Iwamasa's 41 months, while the longest sentence given to a personal assistant in a comparable case, fell well within the guidelines for a cooperating defendant who pleaded guilty.

The most conspicuous disparity involved the two physicians. Plasencia, who referred to Perry as a "moron" in text messages and charged him approximately 380 times the market rate for ketamine, received 30 months [6][8]. Chavez, who supplied Plasencia, received only home detention. Neither lost their medical licenses as part of the criminal proceedings, though both face separate medical board actions [8].

The $57,000 Question: Money and Medical Complicity

Perry was spending roughly $55,000 per month on ketamine at the height of his addiction [13]. The financial trail reveals how that money moved.

Plasencia charged Perry a total of approximately $57,000 for ketamine that cost about $15 per vial at market price [7]. Much of this money flowed through Iwamasa, who served as the physical intermediary — receiving the drugs from suppliers and handling the cash transactions. Plasencia explicitly sought to become Perry's "go-to" supplier, texting Chavez about keeping the pipeline open [6].

The financial records raise unresolved questions about broader medical complicity. Perry was simultaneously receiving legitimate, prescribed ketamine infusion therapy for depression — a legal and increasingly common treatment. The boundary between his supervised medical treatment and the illegal supply chain remained blurred, and prosecutors did not charge any of Perry's legitimate ketamine therapy providers.

The 'Wild West' of Ketamine Regulation

Perry's case occurred against the backdrop of a largely unregulated ketamine therapy industry. Ketamine is legally prescribed for depression, chronic pain, and other conditions, and its use has expanded rapidly in clinics across the country.

There is no federal regulation specifically governing ketamine infusion clinics [14]. The oversight infrastructure that exists for opioid treatment programs does not extend to ketamine clinics. While providers must hold DEA registration and comply with storage and recordkeeping rules, the treatment protocols, dosing standards, and patient screening criteria vary widely from clinic to clinic [14].

California requires physician ownership of medical practices, which provides some structural limitation on who can open a ketamine clinic [14]. But the broader regulatory environment has been described as a medical "wild west," where much of the industry grew before clear, uniform standards developed [15]. Oversight increasingly comes through after-the-fact enforcement — audits, investigations, and medical board actions — rather than prospective regulation.

No licensed ketamine therapy provider involved in Perry's legitimate treatment has faced criminal charges or publicly reported professional discipline in connection with his death.

The Celebrity Overdose Pattern: Perry and Jackson

The prosecution of Iwamasa invites comparison to the most prominent prior case of a celebrity's enabler facing criminal consequences: the conviction of Dr. Conrad Murray for the 2009 death of Michael Jackson.

Murray, Jackson's personal physician, was convicted of involuntary manslaughter for administering propofol — a surgical anesthetic — in an unmonitored home setting to help Jackson sleep [16]. Prosecutors described Murray as "an incompetent, greedy opportunist who recklessly gave Jackson propofol" and "set aside sound medical judgment" when Jackson begged for the drug [16]. Murray was sentenced to four years in prison but served less than two, released after roughly 23 months due to prison overcrowding [17].

The parallels are structural: in both cases, a wealthy, powerful individual with known substance issues obtained dangerous drugs through people on their payroll. In both cases, the person physically present at the death was prosecuted while broader systemic failures — in Jackson's case, the entertainment industry's willingness to look away; in Perry's, the lack of ketamine oversight — received less scrutiny.

But the Perry case went further. Where the Jackson prosecution targeted a single physician, the Perry investigation charged five people across an entire supply chain. The question is whether that breadth represents thoroughness or whether, as some defense advocates have argued, it criminalizes roles that fall closer to enabling an addict's choices than to traditional drug trafficking.

The Legal Line Between Enabling and Distribution

Federal law draws the criminal boundary at distribution — the knowing transfer of a controlled substance to another person. Simple possession for personal use, while illegal, carries lesser penalties. The distinction is straightforward on paper but becomes complicated when the "distributor" is an employee carrying out their employer's instructions.

Iwamasa's defense argued that he occupied a gray area: financially dependent on Perry, following direct orders, and acting within what he understood to be a caregiver role. The prosecution countered that Iwamasa was not a passive servant but an active participant who sought out suppliers, handled transactions, and injected drugs he knew were dangerous into a person he knew was an addict [2].

Judge Garnett's ruling sided firmly with the prosecution's framing. The sentence signals that physically administering illegal drugs — regardless of who requested them and regardless of the power dynamic — crosses the line from enabling to distributing.

No prominent legal scholars have publicly challenged the conspiracy charge as applied to Iwamasa, though defense attorneys in the case argued that the prosecution's theory could chill caregiving relationships in which employees or family members feel unable to refuse a powerful person's self-destructive requests [10].

Failure Points in High-Net-Worth Addiction Treatment

Perry publicly disclosed decades of addiction struggles. In his 2022 memoir Friends, Lovers, and the Big Terrible Thing, he wrote that he had spent more than $7 million trying to get sober, including 15 trips to rehab [13]. In a separate interview with the New York Times, he put the figure closer to $9 million [13].

Source: CDC / NCHS

Data as of Dec 1, 2024CSV

Perry's death occurred during a period of record drug overdose deaths in the United States. Provisional CDC data shows overdose deaths peaked at approximately 111,466 in mid-2023 — around the time of Perry's death — before declining to roughly 80,860 by December 2024, a 24.3% drop [18].

Perry's case illustrates specific vulnerabilities in addiction treatment for the wealthy. Money that could purchase the best rehabilitation in the world also purchased an untrained assistant who would inject ketamine on demand, physicians willing to charge predatory prices for illegal prescriptions, and a lifestyle insulated from the external accountability structures — employers, financial constraints, legal consequences — that sometimes force less wealthy addicts into treatment or sobriety.

The people around Perry had been told to watch for relapse. His family explicitly instructed Iwamasa to contact them if Perry appeared to be using again [11]. Instead, Iwamasa became the primary vector of the relapse itself, and — according to Ferguson's testimony — actively isolated Perry from the people who might have intervened [10].

What the Case Leaves Unresolved

The five sentences close the criminal chapter of Matthew Perry's death. They do not resolve the regulatory gaps in ketamine therapy, the structural vulnerabilities that allow wealthy addicts to purchase their own destruction, or the question of how far criminal liability should extend when addiction and employer-employee relationships intersect.

Iwamasa is expected to report to prison in the coming weeks. His 41-month sentence will make him the defendant who served the second-longest term in the case, behind Sangha. When he is released, Perry's family will still be grappling with the knowledge that the man they trusted most to keep Matthew Perry alive was, in the end, the one who injected the drugs that killed him.