Jack Harrison Vincent Sadler, 29, of Dion Crescent, has pleaded not guilty to the murder of Jake Anderson-Brettner, 24, about 7.30pm on August 15, 2018, at the house in Riverside.

Defence counsel Greg Richardson says Mr Sadler was involved in the disposal of Mr Anderson-Brettner's mutilated body along with his partner Gemma Clark at Tasman Highway and in wheelie bins around Launceston.

But he said it was a circumstantial case and urged the jury to wait until they've heard all the evidence.

On Friday, Crown prosecutor Emily Judd sought details of items seized by police in the days after the alleged murder including a firearm and silencer, boxes of ammunition, sets of hidden keys and a pill press for manufacturing drugs.

Detective Constable Amanda Munro said the paperwork for the Jeep purchase and a Range Rover from Neil Buckby Motors was found in the bedroom.

The trial has heard Mr Sadler owned the Jeep Cherokee, his partner Ms Clark a black Range Rover and Mr Anderson-Brettner a black Nissan Navara.

A black pistol case bearing the name Smith and Wesson was found in a wardrobe and a pill press and two magazines for a pistol found at a storage shed at Legana.

A photo on August 20, 2018, of an injury on the left hand of Ms Clark was taken by Senior Constable Maree Fish.

Detective Sergeant Darren Turner located a 9mm Smith and Wesson, semi-automatic pistol in a vacuum-sealed bag in bushes at the rear of Mr Sadler's house.

Detective Senior Constable Anthony Latham found a taped-up PVC pipe containing three boxes of 9mm ammunition including solid point and hollow point ammunition and a silver silencer.

Swabs of the ammunition were taken and forwarded to FSST.

The Crown alleges Mr Sadler shot Mr Anderson-Brettner three times.

Senior Constable Jonathon Frankcombe found keys from the Jeep Cherokee hidden in a light fixture near the front door. The jury has heard that the Jeep was found parked in Andrea Grove on August 17 after a resident saw a black car pick up the male driver.

A set of keys to a home at Fairway Crescent, Riverside, being rented by Mr Anderson-Brettner, and a ziplock bag containing ammunition were found in a drain at Dion Crescent.

Keys to Mr Anderson Brettner's black Nissan Navara were found in a drain at Peel Street, Summerhill, on August 20, 2018. The car itself was spotted by residents in Balmoral Avenue, Riverside, about 8.15pm on August 15.

Senior Constable Donna Stafford said she photographed a number of reddish stains from several rooms in the house at the request of Forensic Science Services Tasmania.

Takeaway food was found in a rubbish bin outside the home. The jury has seen CCTV footage of Mr Anderson-Brettner buying McDonald's about 7.18 pm on August 15. Two fingerprints on a ziplock bag were found by Senior Constable Rodney Walker.

First Class Constable Marcus Williams photographed three areas of interest in the Jeep Cherokee located with the help of luminol, a substance that illuminates blood.

Other items found included cash and a ziplock bag containing three spent cartridges.

The jury heard on Thursday that Mr Anderson-Brettner took a shopping bag from a cupboard at his friend Thomas Larissey's house about 7pm on August 15. Director of Public Prosecutions Daryl Coates SC said only the accused knew what part drugs played in the alleged murder.

Mr Richardson cross-examined several witnesses during the first week suggesting that Mr Anderson-Brettner was involved in drug dealing. He asked his fiance Katlyn Roney whether she had questioned how an apprentice butcher could spend $40,000 on doing up a car and buying a $4000 puppy.

The jury heard that the rap song Dead Body Disposal was on two separate playlists on mobile phones owned by Mr Sadler.

Constable Peter McCarron said two Spotify playlists under the name "gym only" and another under the name "gym" were on the phones. In his opening address, Mr Coates SC said the song was one Mr Sadler liked listening to.

He read to the jury some of the gruesome lyrics of the song by American rapper Necro.

Mr Coates said it was the Crown case that Mr Anderson-Brettner was disposed of in a very similar way to that described in the song.

"This is how the accused got the idea and he was thinking about it beforehand," Mr Coates said.

Mr Richardson asked Constable McCarron if he had photographed a playlist from Ms Clark's phone. "No, no one asked me to do that," he said.

Constable McCarron gave evidence that the house smelt strongly of bleach when he went there as a forensic officer.

"There was an overwhelming smell of bleach and cleaning product," he said.

"It was a strong enough to make my eyes water. He said that he also noticed that the home was incredibly warm.

"There was a woodheater in the middle of the lounge room," he said.

The Crown alleges that Mr Sadler and Ms Clark burnt carpet in the woodheater after they beheaded and dismembered Mr Anderson-Brettner.

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