John Sheffield’s act of murdering his friend and caretaker, Kenneth Magee, has inflicted enduring heartache on Magee’s family and friends.

“A single moment can alter the course of one’s life forever,” Kristy, Magee’s daughter, emotionally shared with the Victorian Supreme Court on Monday.

Kristy recounted how she went from relaxing on her couch watching television to urgently dressing and heading to the hospital, desperate to reach her dying father.

A mere four minutes after receiving the devastating call from authorities, another call came, plunging her further into a chaotic and irreversible reality.

“There are times when my anger feels like it could shatter everything around me, and then there are moments of overwhelming numbness,” she shared, reflecting on the aftermath of her father’s passing.

“The tears I’ve shed could fill Olympic-sized swimming pools,” she lamented.

Once a dedicated sous chef who loved her job, Ms Magee now spends her days withdrawn from family and friends, suffering from the mental overload stemming from her father’s death.

“His life was stolen away from someone he once called a friend,” she said.

Mr Magee’s younger sister Allison Menzies remembers her brother as a selfless man who cared for his friends, loved animals and made an impact as a prolific blood donor.

“Whenever I think of Ken, I would smile from the memories,” she told the court.

It’s been almost a year-and-a-half since Mr Magee’s death, but time has not begun to heal her wounds.

“Instead the grief is festering deep inside me,” she said.

“Ken was given a death sentence, but I was given a life sentence.”

Menzies reminisced about a life free from fear and anxiety before losing her brother.

“Now my dreams are haunted by my brother’s screams,” she said.

For both women, the actions of Sheffield, 56 – who admitted murdering Mr Magee on December 2, 2024, in their home in Melbourne’s west – has caused ongoing struggles.

“Kenny was loved, and I hope he gets the justice he deserves,” Menzies said.

Mr Magee, 62, was sitting in the living room of the Werribee home when Sheffield entered and bludgeoned him with a hammer.

A neighbour heard shrieking coming from the house and called police who arrived to find the victim laying unconscious on the couch with severe head injuries.

He was rushed to hospital but succumbed to his injuries, which included skull fractures and brain lacerations from five blunt impacts.

Sheffield initially told police someone had broken into their home while he was in his room listening to a John Farnham DVD loudly.

He said he went outside for a cigarette before coming back to find Mr Magee on the couch with blood coming out of his head.

Sheffield, who has been diagnosed with schizophrenia, pleaded guilty to one count of murder in March.

Defence barrister John Desmond detailed the pair’s relationship history, referring to statements and reports from a neighbour and a domestic violence organisation which alleged Mr Magee would hit his client in the head with a closed fist, and in the stomach and face.

“It was in that setting that my client had committed the offence of murder,” he told the court.

He said the alleged domestic violence had negatively impacted Sheffield’s schizophrenia diagnosis, leading to a slowing of his cognitive and decision-making process which resulted in the murder.

But prosecutor Grant Hayward urged Justice Rita Incerti to be cautious about the domestic violence claims, given Sheffield had lied to police before.

He referred to an earlier hospital report that stated Sheffield had denied any concerns about his carer and that he did not feel unsafe with him.

Justice Incerti will hand down her sentence at a later date.

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