THE justice in a Sunshine Coast murder case told a jury that the Crown relied on the accused's lies to prove his guilt and they must be satisfied those untruths were deliberate.
Justice Ann Lyons said the Crown argued if Wayn Edward Raymond McClutchie accidentally killed his partner Noelene Beutel, both 35 at the time, at their Buderim home then he would not have tried to cover it up.
"He was lying to police to cover up his guilty of murder or manslaughter," she said the Crown had argued.
Justice Lyons told the 12 people deliberating on the case they must be satisfied it was a deliberate untruth when Mr McClutchie told police he did not know where Ms Beutel had gone when she went missing.
Mr McClutchie initially told police he had last seen his former partner leaving in her Holden Commodore and had no idea where she was.
He later admitted he punched her in a violent confrontation on June 29, 2011, and that she fell and hit her head on a brick in the car port.
Mr McClutchie also admitted he used a wheelie bin to drag her lifeless body to the boot of her car which he drove to bushland at Tanawha and set alight.
Justice Lyons said Mr McClutchie's defence barrister submitted his client was under the influence of drugs and the jury should not rely on anything he said to police during that period.
The jury did not reach a verdict on Monday and will continue their deliberations on Tuesday.