Accused murderer Greg Lynn demonstrated to police how he fought with missing camper Russell Hill over a knife before the older man was fatally stabbed.

The airline pilot's interview with Victoria Police was played to a Supreme Court jury on Monday, as he stands trial accused of murdering Hill, 74, and Carol Clay, 73, in March 2020.

It's alleged Lynn killed the couple at Wonnangatta Valley, in the state's northeast, and then disposed of their bodies in bushland before burning the remains months later.

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Lynn has pleaded not guilty to both counts of murder and maintains the deaths were accidental.

In his November 2021 interview, played to the jury, Lynn outlined to police the week he spent camping and hunting deer in the High Country, at times indicating his location on a map.

He first encountered Hill and Clay on March 19 when the couple arrived at his campsite, noting they had been very cordial and pleasant.

Lynn told police Hill acted less friendly the next morning as he prepared to go hunting, noting the older man pointedly mentioned a friend had been killed in a hunting accident.

Lynn said as he returned to the campsite hours later, he saw a drone hovering overhead and later realised it belonged to Hill.

When he confronted Hill about the drone, Lynn said Hill threatened to send police the footage of him hunting close to the campsite.

Lynn told officers he removed himself from the conversation but decided to blast music from his car stereo in what was a "childish thing" to do.

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Later that evening, Lynn said Hill approached his car and took his shotgun and ammunition from inside the vehicle.

Lynn told police he confronted Hill and the older man told him to "f— off" before shooting a couple of rounds into the air.

A struggle ensued over the gun, Lynn said, with another shot being discharged and striking Clay in the back of the head.

Lynn maintained he did not have a hand on the trigger at any point and Hill dropped the gun after Clay had been hit.

Lynn told police he returned the gun and ammunition to his car and turned off the radio when Hill came at him with a knife, yelling that Clay was dead.

The airline pilot said he blocked Hill's punch and another attempt to strike him with the kitchen knife, demonstrating how he grabbed Hill's arms.

Lynn told officers as he fell to the ground, the knife went through Hill's chest.

The older man tried to crawl away but died at the scene, Lynn said.

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Lynn told police he panicked and believed he was going to be blamed for the couple's deaths, so he placed their bodies in his car and burnt their campsite.

He admitted there was a lot of blood, both at the campsite and in his trailer as he drove the bodies to the Union Spur track and left them there.

Lynn told police he went back to the track in June 2020, once a COVID-19 lockdown lifted, to check on the bodies.

He returned in November of that year to burn the remains.

"There's not going to be much left for the families … there's not much to see," Lynn told police in the interview, the court heard.