The distraught mother of a Victorian woman who was brutally killed and mutilated by a family friend broke down describing the "indescribable" loss.
Shaye Kotiau, 23, admitted murdering Tamara Farrell after a games night at her home in Canadian, a suburb of Ballarat, in February 2019.
"I don't know if I can read this again," Nellie Farrell told the Victorian Supreme Court on Wednesday through tears.
Crown prosecutor Patrick Bourke finished reading out the statement after Ms Farrell became too upset to continue.
"The pain is indescribable, utterly indescribable," she wrote.
"No words can ever relate the horror and gut-wrenching loss that smashes into your soul."
Kotiau killed the 31-year-old bus driver and enlisted his sister Kieahn to help dispose of the remains.
"I'm going to show you something that's going to change our lives forever," he told Kieahn before showing her Ms Farrell's battered body.
They drove 300km with Ms Farrell's body before dumping her on a roadside at Nambrok, stopping to buy petrol on the way.
Kotiau then mutilated Ms Farrel's face with tools, removed her teeth to hide her identity, and set her body on fire.
Some of her teeth and a necklace were later found dumped in a plastic bag under a bridge at Altona.
Nellie Farrell said she watched her daughter's killer grow up and never thought they'd be the ones to hurt her.
"The people responsible were the last people that I ever thought would hurt her," she said.
The victim's sister Tori McDonald said it felt like she had lost a limb and she felt betrayed by the people she had grown up with.
"(They) betrayed me and stole my sister's life," Ms McDonald said.
The killer at first denied knowing what happened to Ms Farrell before he later confessed to his girlfriend the day after.
"I've done something that I can't reverse, it's unforgivable," Kotiau told her.
He repeatedly said the murder felt "like a dream" but told his girlfriend "it was brutal".
Kotiau's lawyer said his client had no recollection of the killing and at the time he was extremely intoxicated.
"His actions used extreme force, nevertheless the precise circumstances of how he killed Ms Farrell will never be known," defence barrister Jarrod Williams said.
Prosecutor Patrick Bourke said Ms Farrell was attacked in her bed while she was vulnerable and the attempt to conceal her body was "calculated".
"It shows a complete and utter disregard for Tamara as a person," Mr Bourke said.
It was also unclear what sparked the "brutal" attack, he said.
Justice Paul Coghlan will hand down his sentence next week.