The mother of an accused murderer screamed at police to "kick the door in and save my brother," after her son was wielding a knife while looking evil and possessed, a NSW trial has been told.
Warren Anthony Scott's mother had left her Eden home in April 2019 after her son had pulled a knife out on her twice.
She had seen her son drunk countless times but never looking and sounding "possessed ... something evil you see in a movie," Jessie Scott told the NSW Supreme Court on Monday.
Scott, 38, denies his fatal stabbing of Edward Carter was murder but asked the incident to be considered manslaughter.
The Crown has rejected this plea.
Two videos played on the first day of Scott's murder trial showed Ms Scott and her niece Stacey Arvidson speaking separately with detectives in April 2019.
Ms Scott detailed how her son had held a knife to her throat before she talked him down, but after some silence, he grabbed a second knife.
She later saw her son on Mr Carter in the lounge room with a knife to his throat.
"I told him to leave him alone, to let him go, that he'd done nothing wrong to him," she said.
Ms Arvidson lived across the road from Ms Scott who approached her yelling that Scott was "mucking up," so she called emergency services, she said in the police recording.
She then peered inside Ms Scott's window where she could see "Uncle Eddie" shaking on the couch with his head down, while Scott sat beside him, with the serrated knife's edge at his skin.
As Scott casually smoked a cigarette "like he was enjoying a cup of tea," it was his face that scared her, she said.
The normally happy-go-lucky Scott was known for cracking jokes while drinking but on this day his eyes looked "really, really dark," she said in evidence on Monday.
"Just felt like he could look straight through his eyes and into yours. Really weird."
Police officers soon arrived at the home and continued to ask Mr Carter if he was OK but Scott would not let him speak.
One officer asked Ms Arvidson if it was a "hostage situation" before dialling a specialist unit.
"I heard a noise, not sure if it was a yelp ... then I heard the screen door getting ripped off its hinges," Ms Arvidson said.
"Aunty Jessie is screaming 'kick it in you need to save my brother' then I heard both officers ... telling Warren to drop the knife."
As officers escorted Scott outside he stopped and looked back at the house and then towards the police car.
"Looks like I'm going to jail for the rest of my life now," Ms Arvidson recounted him saying.
In the days prior, Scott hadn't taken his medication, a relative told the trial.
Kevin Dixon, a cousin of Ms Scott, said everyone knew the accused murderer didn't take his medication when he drank.
"When I say when he drinks, I mean he was drinking two weeks straight," Mr Dixon said.
A teetotaler, Mr Dixon had driven Scott home "hundreds of times" but "he wasn't Warren" the final time he was in his car, the witness said.
Scott, who'd requested the lift because he was "freaking out", was staring, not talking and looked like he was "somewhere else", Mr Dixon said.
Mr Dixon, Ms Scott and another witness said they'd never seen any animosity between the accused murderer and his victim.
The trial, before Justice Natalie Adams without a jury, continues.