Chilling mobile phone recordings of murderer Joseph Robert Houston armed with a machete in the moments after he fatally slashed the throat of a New Year’s Eve partygoer at a beach rave has been released by the Supreme Court.

The recording was tendered as evidence in Houston’s trial and was released by the court this morning after the 24-year-old was convicted yesterday of murdering James Dean Dorloff at the party at Wedge Island in the early hours of 2014.

Killer had history of machete attacks

Jurors, who were played the footage during the six-day trial, deliberated for more than seven hours before delivering the verdict late yesterday.

They also convicted Houston of a charge of grievous bodily harm with intent for slashing the machete at partygoer Tyson Cummings, severing four of his fingers and injuring nerves and tendons in his left hand.

James Dorloff's injuries were fatal from the moment they were inflicted. Picture:Facebook

The West Online revealed today that Houston has two previous convictions for offences relating to machetes.

The jury was not aware of the previous convictions after a late application to raise the information was dismissed on the grounds of its timing and issues relating to fairness.

But during legal argument in the absence of the jury earlier this week, it emerged that Houston was convicted of possessing a controlled weapon after he pulled out a machete during a fight in Hearne Hill in October 2011.

He was also convicted of unlawful wounding for pulling out a machete with a 50cm-long blade during an altercation at a skate park in February 2013. In that incident, Houston struck the victim and caused a laceration that needed plastic surgery.

Houston had been on an intensive supervision order for the wounding offence at the time of the murder and grievous bodily harm.

Justice Stephen Hall has requested that the facts relating to the two prior offences be made available when Houston is sentenced in August.