The extensive federal investigation into the tragic passing of beloved television star Matthew Perry has reached its judicial conclusion. In a Los Angeles federal courtroom on Wednesday, U.S. District Judge Sherilyn Garnett sentenced Kenneth Iwamasa, Perry’s former long-time personal assistant, to 41 months (nearly three and a half years) in federal prison.
The 61-year-old assistant had previously pleaded guilty to conspiracy to distribute ketamine causing death. The sentencing marks the final chapter in a sweeping criminal prosecution that targeted an underground network of enablers, medical professionals, and street dealers who exploited the Friends actor’s severe struggles with substance abuse.
The Fatal Timeline of October 2023
According to detailed court documents and his own signed plea agreement, Iwamasa admitted to repeatedly injecting Perry with large doses of ketamine despite possessing absolutely no medical training.
On October 28, 2023, the day of Perry’s death, Iwamasa administered a total of three ketamine injections to the actor. Court records reveal that the 54-year-old sitcom star’s final words to his assistant were a request to “shoot me up with a big one.”
Chronology of the Final Day:
• Morning/Midday: Iwamasa administers two preliminary ketamine injections.
• Final Moments: Perry requests a third, larger dose. Iwamasa injects him.
• The Departure: Iwamasa leaves the Pacific Palisades residence to run errands.
• The Discovery: Iwamasa returns to find Perry's lifeless body floating in the hot tub.
An official autopsy report later confirmed that the actor died from the “acute effects of ketamine,” which led to subsequent cardiovascular overstimulation and drowning. Prosecutors revealed that Iwamasa had become Perry’s primary “enabler and supplier,” administering more than 25 dangerous shots of the drug in the five days leading up to the fatal incident.
Emotional Courtroom Confrontations and Regret
During the tense sentencing hearing on Wednesday, Perry’s stepfather, veteran Dateline journalist Keith Morrison, directly addressed the court to denounce Iwamasa’s gross negligence.
“You kept injecting him with more,” Morrison stated to the defendant. “You could have called somebody.”
Taking the stand before his sentence was handed down, a visibly emotional Iwamasa expressed deep remorse to Perry’s family and the public. “I am so sorry to all of you,” Iwamasa told the courtroom. “I’m just so sorry to have done illegal acts I will forever regret. I will take that to my grave.”
The Complete Legal Verdicts of the Five Co-Conspirators
Federal prosecutors successfully secured convictions against all five individuals accused of facilitating Perry’s illegal access to the surgical anesthetic. The aggressive prosecution targeted the supply chain from high-end street dealers to corrupt medical doctors:
| Defendant | Role in Conspiracy | Final Judicial Sentence |
| Jasveen Sangha (The “Ketamine Queen”) | High-end Los Angeles drug dealer who sold the fatal batch. | 15 Years in Federal Prison (Sentenced last month) |
| Kenneth Iwamasa | Personal assistant who repeatedly injected the actor. | 41 Months in Federal Prison (Sentenced Wednesday) |
| Dr. Salvador Plasencia | Distributed ketamine and mocked Perry’s financial vulnerability. | 2.5 Years in Federal Prison (Sentenced December) |
| Erik Fleming | Certified drug counselor who acted as a distribution middleman. | 2 Years in Federal Prison (Sentenced earlier this month) |
| Dr. Mark Chavez | Conspired to divert medical-grade ketamine for profit. | 8 Months of Home Detention (Sentenced December) |
The most severe penalty fell upon Jasveen Sangha, known widely as the “Ketamine Queen,” who received a lengthy 15-year sentence for operating a boutique drug emporium out of her luxury apartment. Meanwhile, Dr. Salvador Plasencia—who text messages revealed once wrote of Perry, “I wonder how much this moron will pay”—is currently serving a two-and-a-half-year prison sentence.
With Iwamasa’s 41-month sentence officially locked in, the Department of Justice has successfully dismantled the specific network responsible for cutting short the life of one of television’s most iconic comedic talents.