The mother of a woman stabbed to death by her teenage son has described his 13-year jail sentence as "a joke", saying her grandson should never be allowed to walk the streets again.
Bradley Craig Mottram, now 22, "snapped" at a home in Inverell in October 2015 when his 51-year-old mother Simone said something that upset him, the NSW Supreme Court heard on Thursday.
Acting Justice Peter Hidden handed the "troubled young man" an 18-year sentence with a non-parole period of 13-and-a-half years, saying it was clear he was in a disturbed state of mind and was remorseful.
"That wasn't a sentence, that was a joke," Ms Mottram's mother Maureen O'Bryan told AAP outside court.
"That guy should not be out on the street with what he did ... it's a joke."
That guy should not be out on the street with what he did ... it's a joke.
- mother Maureen O'Bryan
The court heard Mottram punched his mother before beating her with a bourbon bottle and going to the kitchen to grab a carving knife.
He then stabbed his mother repeatedly in the chest, abdomen, neck and face before placing the weapon on her body and covering her with a blanket.
Mottram fled the scene in her car and wrote admissions in a notebook under an entry titled "My Last Words".
"Holy s***, I'm sorry, this was not planned," he wrote. "I didn't mean to, she just wouldn't shut up."
He accused his mother of "wiring" him from birth. The court heard Mottram had a "troubled" upbringing and was diagnosed with borderline personality disorder.
His mother, who also suffered mental health issues, was a drinker and Mottram was exposed to domestic violence.
By 2015, as a 19-year-old, he was abusing cannabis and codeine and was experimenting with hallucinogens.
The court heard Mottram made various comments about falling out with "bad people" who were out to get him, including outlaw bikie gangs.
After the murder, Mottram described his mother as "mean", a "bad woman" and a "bitch" who turned good boyfriends into bad people.
In calls to his relatives from custody, he estimated he only remembered about five per cent of the attack.
"I'm glad I don't remember. The bits I do remember are so horrible," he said.
Acting Justice Hidden said it was tragic the attack took place when Ms Mottram had achieved some stability in her life.
"A dreadful crime has been committed by a very troubled young man," he said.
On October 19, 2015, Mottram was at the Inverell property alone with his mother when he launched the attack, first punching her and bashing her with the bottle.
The offender mounted a brutal attack upon his mother. He punched her, felled her with a blow from the bottle, went to the kitchen and seized a knife, and continued his attack by stabbing her repeatedly to the head and upper body.
- Acting Justice Peter Hidden
“The offender mounted a brutal attack upon his mother. He punched her, felled her with a blow from the bottle, went to the kitchen and seized a knife, and continued his attack by stabbing her repeatedly to the head and upper body,” Acting Justice Hidden said.
He said it was clear “his intention was to kill her”.
“However, I accept that the attack was spontaneous, triggered by some kind of angry exchange between the two of them,” he said.
Mottram will be eligible for parole in April 2029.
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A NSW man who stabbed his Inverell mother to death as a teenager has been sentenced to at least 13-and-a-half years in jail.
Bradley Craig Mottram, 22, hit Simone Mottram, 51, over the head with a bottle of bourbon and stabbed her in the chest, neck, upper abdomen and face after she said something that made him snap at an Inverell home, in October 2015.
The NSW Supreme Court on Thursday heard Mottram had a dysfunctional upbringing and struggled in the lead-up to the killing with substance abuse and deteriorating mental health.
A dreadful crime has been committed by a very troubled young man.
- Acting Justice Peter Hidden
"A dreadful crime has been committed by a very troubled young man," Acting Justice Peter Hidden said in sentencing.
On October 19, 2015, Mottram was at the Inverell property alone with his mother when he launched the attack, first punching her and bashing her with the bottle.
He then went to the kitchen and grabbed a carving knife before repeatedly stabbing Ms Mottram to death.
The court heard Mottram placed the knife on Ms Mottram's body and covered her before fleeing the scene in her car.
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Following his arrest, he made admissions to the crime and said: "I didn't meant to do it, she just wouldn't shut up".
Police found notes written by Mottram before he was taken into custody which he titled "My Last Words" in which he repeatedly insisted the attack wasn't planned.
"I was drunk. It was an accident. She just, she wired me from birth. I'm sorry. I didn't mean to," he wrote.
"Oh Jesus, what have I done?"
I was drunk. It was an accident. She just, she wired me from birth. I'm sorry. I didn't mean to.
- Bradley Mottram's notes recovered by police
Mottram later told relatives he remembered about five per cent of the incident because he was coming down off drugs, but he was pleased he didn't remember it.
Justice Hidden sentenced Mottram to 18 years in prison with a non-parole period of 13-and-a-half years, saying it was clear the offence took place against the backdrop of mental health issues.
"I think it is unlikely he would offend again in this way or at all," Justice Hidden said.
Mottram will be eligible for parole in April 2029.
Australian Associated Press
