Right there, on his desk, is the very thing that may link him to the Lin family murders.

It is May 2010, nearly a year since the battered bodies of his brother-in-law's family were found, and the police are closing in.

Xie knows detectives have found bloody shoe prints in the Lin family's North Epping house, and they  may match a style of Asics sneaker he wears.

So he collects his shoe boxes, cuts them up, soaks them in a bucket, and flushes the cardboard down the toilet.

Unbeknownst to Xie, police were watching, having set up a pinhole camera in his house to track his every move.

The eerie surveillance video – along with other crucial evidence that helped convict Xie – was publicly released by the NSW Supreme Court on Monday, after a jury found the 53-year-old guilty of five counts of murder.

In Xie's recorded police interviews, he describes watching cycling, cricket and movies at his home on the night of the murders, before going with wife Kathy to her brother's house on the morning of July 18, 2009.

There they found the bodies of Min Lin, his wife Lily, her sister Irene, and the Lins' young sons Henry and Terry lying in pools of blood in their bedrooms.

"I look at the direction of the bed, I can see everywhere was red, red, everywhere is, I think I saw my sister-in-law first," Xie told police days after the murders.

"Once I saw her, I held Kathy and say 'Kathy, don't look at it', but I believe Kathy had already seen it."

The court heard Xie told his wife not to look at Lily's body at a time when he wasn't in a position to see it, and that Min's body was hidden under the covers in the same bed.

The triple-0 calls Kathy Lin made after finding her family's bodies have also been released.

Flustered and crying, Ms Lin tells the emergency operator: "I'm not sure, but maybe someone killed, killed my brother's family now."

She is also captured telling her husband in Cantonese: "I am more scared than you are."

In March 2010, Xie made a call to Detective Sergeant Joseph Maree​ trying to clarify how many bodies he saw in the Lin's house that morning.

But the call only strengthened detectives' suspicions about Xie.

According to a transcript of the call, Xie told Detective Sergeant Maree​ he may have told a police officer at the scene there were five bodies in the house, but in fact he meant "four or five".

At trial, the Crown argued this conversation helped prove Xie was the killer because he was in a position to know there were five victims from the outset, despite Min Lin's body lying undiscovered for some time.