Matthew Perry's live-in assistant deleted evidence and changed passwords after actor was found dead

• Prosecutors allege Iwamasa injected Perry with multiple ketamine shots on the day of his death in October 2023
• He allegedly directed another person to dispose of ketamine vials, syringes, and incriminating documents immediately afterwards
• Iwamasa reportedly admitted in a phone call that he "cleaned up the scene" and "deleted everything" on Perry's devices
  

Matthew Perry's former live-in assistant, Kenneth Iwamasa, allegedly moved swiftly to destroy evidence linked to the ketamine supply that contributed to the actor's death — tampering with the scene almost immediately after Perry was found unresponsive.

According to a new court filing obtained by TMZ, federal prosecutors claim Iwamasa began concealing and destroying evidence straight away following the Friends star's death, allegedly directing another individual to dispose of ketamine evidence, shred documents, and erase digital records.

A web of lies told to investigators

Prosecutors further allege that Iwamasa repeatedly lied to investigators throughout the subsequent enquiry. He initially concealed the fact that he had personally injected Perry with multiple ketamine shots on the day of his death. He subsequently claimed that Perry had hidden the ketamine bottles himself — an account prosecutors dispute.

The filing states that Iwamasa instructed a person identified only as BM to dispose of ketamine vials and syringes in the aftermath of Perry's death.

He is also alleged to have ordered the shredding of a ketamine prescription document and a handwritten note identifying Dr Salvador Plasencia as a source of the drug.

"Cleaned up the scene" and changed passwords

Prosecutors cite Iwamasa's own admission to the clean-up operation during a recorded telephone conversation with middleman Erik Fleming, in which he reportedly claimed he had "cleaned up the scene," disposed of bottles and syringes, "deleted everything," and even changed the passwords on Perry's personal devices.

Sentencing and background

Federal prosecutors are seeking a custodial sentence of 41 months for Iwamasa, who is scheduled to appear before a judge for sentencing on Wednesday.

Matthew Perry, who had been openly candid about his long battle with drug addiction for decades, was found dead in his jacuzzi on 28 October 2023 at the age of 54.