Bradley Bell, of Pimpama, faced trial in Brisbane Supreme Court on Tuesday for the second day of his trial after pleading not guilty to the murder of Kelly Wilkinson, 27, on April 20, 2021.
The 29-year-old is accused of murdering Ms Wilkinson by aiding her estranged husband Brian Earl Johnston, 37, by driving him to her Gold Coast home after buying a 20-litre can of petrol together.
The jury was shown a video of a formal interview Bell had with detectives on July 20, 2021 in which he said Johnston "mentioned multiple times how he wanted to kill Kelly" and "tie her up and burn her".
Bell told Detective Sergeant David Moore and Detective Senior Constable Prue Donald he did not challenge Wilkinson when he made those types of comments up to 15 times a day.
He said this was because he was homeless after attempting to find mining work in remote Queensland.
"I needed to work. I was (camping rough) in the bush. I had just lost my licence. He's my boss," Bell said.
He said he accepted an offer of $1000 from Johnston to drive him around and now felt "taken advantage of".
"We just played along with it. Looking back I shouldn't have played along as soon as he mentioned killing," he said.
The jury was shown CCTV footage of Bell driving Johnston to a service station just after 3am on the day Ms Wilkinson was killed and removing a red jerry can from the boot before filling it with petrol.
Bell entered the station to pay for the fuel and buy iced tea and an energy drink with cash from Johnston, who stayed inside Bell's Nissan Pulsar sedan.
Bell told detectives it "sounds bad" he did know at the time why Johnston wanted the petrol but he never thought he would go through with his plan to kill Ms Wilkinson.
"I knew his intentions but I didn't think he was going to follow up. I was getting $1000 out of it and he was my boss and I needed that job. I rolled with it," Bell said.
When Det Donald asked him why he had been thinking about that early morning drive for the past three months.
"I know I was the one who could have stopped it all. Stopped the whole f***ing thing," Bell said.
He admitted his previous statement was wrong and he did not stop at the petrol station to fill up his car but because Johnston said "don't forget, we need to fill the jerry can up".
Defence barrister Edwin Whitton asked Det Moore if he had "buttered up" Bell with cigarettes before the interview to make sure he did not use his right to silence or legal representation.
"I don't accept that," Det Moore said.
The trial continues before Justice Michael Copley.
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