Corey Loveridge has been sentenced to at least 30 years' jail over the 'sadistic' stabbing murder of a teenage boy in Sydney's west.

His co-offender "AB", who cannot be named because he was a juvenile at the time, was also sentenced to a 30-year non-parole period.

Loveridge, 20, had pleaded not guilty to murdering the 17-year-old, Alan “Ray Ray” Gordon, in North St Marys on December 1, 2010.

The Sydney trial was told Loveridge and another man attacked three brothers. The older two brothers said they saw knives and fled, but the youngest brother fell behind and was attacked by Loveridge and his friend.

He was stabbed repeatedly and left for dead in a gutter.

The boy had almost 40 wounds and died shortly afterwards in hospital.

Justice Adams said the pair got "unimaginable satisfaction or pleasure" from the murder.

"This makes them very dangerous individuals," he said.

The pair got a maximum jail period of 45 years but will be eligible for parole in December 2040.

When supporters of victims families began to clap, Justice Adams stopped them, saying it was "a sad matter" not a matter for rejoicing.

The pair's sentence also takes into account other offences including a break-and-enter on the night of the murder.

Alan's father Ronald Hussey told reporters outside the court that he hoped the pair wouldn't get out in his lifetime.

He described his son as an angel.

View photos Alan Ray “Ray Ray” Gordon was left for dead in a Sydney gutter after being stabbed at least 40 time. Photo: Supplied by Gordon family More

"He would do anything for anyone," Mr Hussey said.

"My son was doing the same thing he did for years, which was go down for his mother early in the morning to get her money out.

"Wrong place, wrong time.

"He just started working, he just loved his job, he just never got a chance.

"I no longer live at home... (his death) has pulled the family apart."

Meanwhile, Loveridge's cousin, Kieran, pleaded guilty last week to the bashing murder of Thomas Kelly, 18, and the assault of three other young males in Kings Cross in just over an hour in July last year.

Speaking to a psychologist after pleading guilty last week, Kieran Loveridge admitted "my stupidity caused his loss of life".

Loveridge, 19, sobbed quietly in the dock of the Supreme Court as he watched Thomas' family and friends recount how unbearable life was without him.

Ralph Kelly, Thomas' father, recalled turning off his 18-year-old son's life support.

"I didn't want to kiss you goodbye, I wanted to kiss you goodnight," Mr Kelly told the court during Loveridge's sentencing hearing.

View photos Kieran Loveridge faces trial over the fatal king-hit on Sydney teenager Thomas Kelly (top right). Photo: AAP More

"There are no words to describe when you lose a child.

His mother Kathy Kelly said instead of going for his green P-plates test, he spent the day in hospital while a piece of his skull was removed.

"I'm simply not whole without him. He was hit by a complete stranger who attacked him in an act of total cowardice."



