Robert Xie has been found guilty of murdering five of his wife's relatives, more than seven years after the family was bludgeoned to death in their Sydney home.

Xie, 53, had pleaded not guilty to murdering the relatives of his wife Kathy Lin in their North Epping home in the early hours of July 18, 2009.

On its eighth day of deliberations, a NSW Supreme Court jury on Thursday found him guilty of five counts of murder following a six month trial.

As the majority verdict was handed down on Thursday, Xie told the court he did not murder the Lin family.

"I am innocent," he told the jury as he left the court.

His wife Kathy began to cry.

The verdict comes after Xie faced four trials and almost five years on remand in jail after the killings.

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Lian Bin "Robert" Xie (right) arrives at the NSW Supreme Court in Sydney, on Tuesday, June 28, 2016. Photo: AAP

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Lily and Min Lin pictured with sons Terry and Henry. All were murdered in the Lin family home. Photo: Supplied.

Xie gasped in court as the verdict was handed down, before declaring his innocence.

For years he had denied it all and his wife had stood by him.

During the trial, Xie was accused of using a hammer-like object to inflict horrific head injuries on his newsagent brother-in-law Min Lin, 45; his wife Lily Lin, 43; her sister Irene, 39; and the Lins' two sons, Henry, 12, and Terry, 9.

The court heard Xie moved from bedroom to bedroom, first bludgeoning Min and Lily to death with a hammer-like object. He did the same to Irene, finishing with the two children.

Police had focused their attention on Xie, he had access to the house via a key, had knowledge of the home's layout, and the electricity had been cut off.

There was no forced entry, and nothing was taken from the home.

Evidence suggested Xie had sedated his wife on the night of the murders.

It wasn't until two years after the killings that he was charged.

Police alleged he hated his brother-in-law.

#BREAKING: Robert Xie has been found GUILTY of murdering five members of his family in 2009. @7NewsSydney pic.twitter.com/mABKeV7RQH — Natasha Squarey (@NatashaSquarey) January 12, 2017

The Crown alleged he was driven by resentment and jealousy because his brother-in-law Min Lin was seen within the family as a better businessman.

It was alleged he was motivated by anger and resentment over his perceived "subordinate status" within the extended family.

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