Mate Fronts Court Over Angry Anderson Son's Murder

A man has fronted in court charged with murder following the death of Liam Anderson, Angry Anderson's youngest son.

The accused killer of Angry Anderson's son says he was under the control of "something evil" when he allegedly stomped his best friend to death on a Sydney street, court documents state.

Mathew Flame, 20, did not apply for bail and it was formally refused when he faced Manly Local Court on Monday, a day after Liam Anderson, 26, was killed in Queenscliff.

Flame and Mr Anderson documented their friendship through the years on social media - Mr Anderson called Flame his "homie" and "a real one" on Instagram. "Love ya mate x", he added.

But early on Sunday morning, Flame, under the influence of MDMA, marijuana and alcohol, is alleged to have punched and stomped Mr Anderson to death.

Court documents state the pair met up the previous evening with a group of friends at the Brookvale Hotel for drinks before attending an Awful Things hip hop concert at Surry Hills.

Liam Anderson.

Flame and Mr Anderson, an aspiring rapper, allegedly took MDMA and kept drinking until the early hours of Sunday morning.

About 3am the group travelled back to the northern beaches, where Flame allegedly took more MDMA and smoked marijuana, the papers state, but the final dose of the party drug gave him heart palpitations.

He worried he was overdosing and went to the bathroom where he lost consciousness.

"When he regained consciousness he states he was 'under something's control', 'something f***ing evil'," the court documents say.

He tried to leave, but Mr Anderson and the others begged Flame to stay as he walked into the night.

"He's my best friend. I would never leave my best friend," Mr Anderson told the others as he followed Flame down the street.

At the intersection of Pavilion Street and Bridge Road in Queenscliff, just before 6am, a fight broke out between the long-time mates, where Flame allegedly struck Mr Anderson in the body and head multiple times with his fists and bare feet.

A witness passing by saw Mr Anderson lying in the grass face down as Flame's alleged attack carried on.

"What are you doing?" the witness allegedly called out.

Flame stared back expressionless, court documents say.

"Help me," Mr Anderson yelled. But Flame's attack allegedly resumed as the witness fled to call police.

Flame was arrested and handcuffed as police arrived on the scene, and later pepper sprayed when he stood up to watch officers attempt to save the life of his best friend who died at the scene.

His face was still spattered with the victim's blood when he was interviewed at Manly Police Station, the documents state.

Police say Flame made full admissions to the attack and participated in forensic procedures.

"The accused states that he knew what he was doing at the time of the attack, but had no control over his actions," the documents say.

"He stated that killing the victim was the only way he could escape from the 'reality' he was suffering under."

The court has ordered a mental health assessment on Flame.

Flame's lawyer Charles Waterstreet said it was a "double tragedy" for the two families.

"What has happened is lightning has struck twice on two individuals and their families and it's a double tragedy," Mr Waterstreet told reporters outside court.

Flame is due to reappear at the same court on January 29.