'We trusted a man without a conscience' — Matthew Perry's mum's devastating words as his assistant is jailed for his death

If you thought you knew the full story of Matthew Perry's death, Wednesday's courtroom in Los Angeles just added the most gut-wrenching chapter yet.

Kenneth Iwamasa, 60 — the live-in personal assistant who shared Perry's home and injected the Friends star with ketamine — has been sentenced to 41 months in federal prison. He will report behind bars on 17 July.

It was Perry's mother, Suzanne Morrison, whose words cut deepest. In a letter submitted to the judge, she described Iwamasa's most important job as being her son's companion and guardian in his battle with addiction — someone who should have kept him drug-free.

Instead, she wrote, he arranged one source of illegal supply, then another.

In a deeply charged moment, Iwamasa took the stand, turned around, and faced Perry's family directly. "I'm so sorry to all of you," he told them. "I will take it to my grave."

He added that he hoped to be "a cautionary tale" for anyone else facing the same choices. Perry's sister Caitlin Morrison was having none of it.

In her own letter, she wrote that when Iwamasa left Perry alone on the night he died, he was "either escaping from something he knew he had done, or wilfully abandoning a vulnerable person in a dangerous situation."

Perry was found dead in his Los Angeles hot tub in October 2023. Prosecutors revealed Iwamasa — who had no medical training — had worked with two doctors to supply the actor with more than £38,000 worth of ketamine in the weeks before his death.

He even administered multiple injections on the very day Perry died. Medical examiners ruled the cause of death as the acute effects of ketamine, with drowning listed as a contributing factor.

Iwamasa was the first of five defendants to strike a plea deal but the last to be sentenced, bringing a multi-year legal saga to a close. He also faces two years of supervised release and a $10,000 fine.

For Perry's family, no sentence will ever feel like enough. But at last, they have an ending.