Angus died after a knife was thrust 14cm into his chest in a fight with the two teenagers at Redcliffe in March 2020.

The two boys – who can’t be named – were 14 at the time.

One is now 16 and the other is 17.

The boys were found guilty of murder by a jury in June.

CCTV footage captured the incident after the two boys pursued a group of youths that included Angus, claiming they were “ripped off” in a drug deal.

Wearing knuckle dusters and handed a knife by another member of his group, Angus confronted the duo and he was stabbed in the chest after being set upon in a two-on-one fight.

The two boys are seen congratulating each other by slapping hands as they “skipped and ran off” as Angus lay dying nearby.

Angus Beaumont

Justice David Jackson said the hand slapping was a gesture that indicated that they had “won the fight”.

“The fight lasted only a matter of seconds, only one lunge connected,” he said.

Both boys had long criminal histories with one offending from the age of 11.

One boy was on probation and the other was on bail at the time of the murder.

Neither had previously received custodial sentences.

The boy now aged 17 also pleaded guilty to three more offences including dangerous operation of a vehicle after stealing a car and sparking a police chase in May 2022 while on bail for murder.

His history included an incident in October 2019 when he stabbed another 15-year-old in the shoulder with scissors.

He was sentenced to seven-and-a-half years behind bars on Tuesday.

“I do not find that you knew or expected …(the other boy) intended to kill or do grievous bodily harm to Beaumont,” Justice Jackson said.

The now 16-year-old boy who delivered the fatal blow to Angus received a nine-year sentence.

“You have a repeated pattern of responding to conflict with aggression including the use of a knife to get what you want on more than one occasion,” Justice Jackson said.

Both boys were ordered to serve 60 per cent of their respective terms.