A daughter who claimed she'd heard voices in her head when she allegedly murdered her mother told a psychiatrist months after the killing: "My mum's why I'm never going to listen to them again."
The jury in Gabrielle Woutersz's ACT Supreme Court trial continued to hear evidence of her mental state on Thursday.
Woutersz, 25, is alleged to have repeatedly struck Norma Cheryl Woutersz, 56, in the head with a claw hammer, smashing her skull, before she tied her mother's body to a ladder and tried to bury it in a planter box in October 2014.
Her father found his wife's body, her feet bound with rope, in the backyard when he arrived home later that night.
Woutersz was arrested and pleaded not guilty to murder.
The killing has not been disputed, and much of the evidence has revolved around the defendant's history of mental illness and drug use.
She had heard voices at the time of the fatal attack, the trial had previously been told.
Forensic psychiatrist Anthony Barker, who saw Woutersz many times in custody, said in his opinion she suffered schizophrenia.
Dr Barker said Woutersz had become tearful when she talked about her mother in the months after the killing and had said of the voices in her head: "They don't stop chatting."
She still heard the voices of God, Lucifer and Satan and said she had believed her mum was evil, the court heard.
"I thought she was trying to kill me," she'd said. "I thought she caused the Holocaust."
He said Woutersz had been distressed about being placed in the territory jail's high needs unit at one stage and felt isolated.
About a year after the killing, Dr Barker noted Woutersz had experienced ongoing problems with grief related to her mother's death.
Woutersz said she still had some auditory hallucinations but told Dr Barker she didn't want to listen anymore to something that wasn't there.
"My mum's why I'm never going to listen to them again," she had said.
Under cross-examination from prosecutor Shane Drumgold, Dr Barker said he hadn't developed any concerns Woutersz's accounts of her symptoms were not genuine.
The trial continues on Monday.