Man tells murder trial he lied to NSW cops

A man who told police he advised a woman to "cook it" when she asked about disposing of a body has told a Sydney jury that he lied in his police statement.

"I did fluff up a bit," he said, while agreeing his signed statement included telling police of a number of incriminating comments made by Lexy May Jamieson.

"Half of it was lies," he told the NSW Supreme Court .

Brothers Azam Charbaji, 26, and Haysem Charbaji, 24, have pleaded not guilty to the July 2014 murder of Dane McNeill, 20, whose smouldering body was found in a burnt suitcase at a Sydney reserve.

Jamieson, 26, has denied being an accessory after the fact.

Monday's witness agreed he made a statement to police on October 29, 2014 about conversations he had with Jamieson, the first on the day before the body was found.

His statement included:

* Jamieson asking "what do I do with it?" and him replying "go cook it, burn it, get rid of the DNA";

* "Lexy asked me for advice about cleaning up the apartment" saying there was a fair bit of blood on the walls;

* Him saying: "You need to contaminate the scene, you need to throw animal blood all over it, you need to use sulphuric acid";

* Him telling her the blood splatter would show up and gyprock needed to be removed from the wall, with her replying: "I'm broke, I can't afford to do that";

* Jamieson saying she got another person to get fuel from a service station down the road to burn the body;

* Jamieson saying: "We moved the body from the car, I am worried about blood in the car".

Prosecutor Margaret Cunneen SC put to the witness that he told police the truth, but he replied "no" - sometimes adding "I don't recall".

"I told the police that so I could receive some sort of a benefit," he said.

That benefit was for a friend - "who was like a brother to me" - to receive a discount on his sentence, he said.

The trial is continuing.