Google could have shown a police officer's plan to dispose of two dead bodies in a dam was doomed to fail, his ex-friend has told a jury.
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Beau Lamarre-Condon, 31, has pleaded not guilty to the February 2024 murders of ex-partner Jesse Baird and Mr Baird's new boyfriend, Luke Davies.
The men's bodies were found at a rural property inside surfboard bags.
The former senior constable first tried to dispose of the bodies in a dam southwest of Sydney but was unsuccessful.
"I told him scientifically that doesn't work with decomposing bodies," the officer's former friend told a NSW Supreme Court jury on Monday.
That advice was offered at a Sushi Train the day after the alleged murders.
The friend, who cannot be legally identified, said that fact could be easily googled.
Defence barrister John Stratton SC asked why the friend got into a car for the drive to the sushi restaurant with someone allegedly confessing to killing two people.Â
"You weren't afraid to get in the car?" Mr Stratton asked.
"I'd been in the car prior," the friend replied.
Lamarre-Condon claims he killed the men in self-defence after entering their Sydney terrace to retrieve his belongings, including a surfboard.
His offer to plead guilty to the manslaughter of Mr Baird was rejected by prosecutors.
Conversations between the 31-year-old officer and his former friend, including one secretly recorded in prison using a wire, were played to the jury on Monday.
In that discussion in December 2025, Lamarre-Condon said he went to Mr Baird's home to pick up his things but had not wanted to do anything wrong.
He held back from saying exactly what went on inside.
"Shit went down," he told his then friend.
During the conversation, Lamarre-Condon said if he had planned on murdering anyone, he would have arrived with cleaning equipment, a stolen van and a gun bought for $10,000 from a youth gang.
He told his friend he did not knock on Mr Baird's door because he did not want to be slapped with an apprehended violence order.
Instead, the then-28-year-old disguised himself as an Uber Eats driver and entered the home wearing a helmet and hi-vis vest.
Lamarre-Condon said he was experiencing mental health difficulties from work, having seen dead bodies and witnessed child abuse material.
The former senior constable also alleged he was bullied by a homophobic sergeant who applied to be his direct supervisor.
He refused to go to a psychologist for fear of losing his job, the jury heard him say.
He said he thought about the idea of killing himself by suicide in Bali and in a Sydney national park and just becoming a missing person.
"If I was going to take my life, I didn't want anyone to find me," he said.
On Friday, the friend told the jury Lamarre-Condon confessed the day of the February 2024 alleged murders.
After being told to come out from his workplace and meet Lamarre-Condon in a strange car, the friend asked what was going on.
"I've done something ... I've killed people," Lamarre-Condon allegedly said.
When asked how he killed them, the sworn police officer allegedly made a firearm gesture with his hand and said: "Pew pew".
"I shot the first one through the head and the second one through the door," the friend recalled Lamarre-Condon saying.
Mr Stratton accused the friend on Monday of deliberately deceiving his client by wearing a wire to the prison.
He suggested the man's aspirations of becoming a police officer had compromised his evidence.
"You have given false evidence about what the accused said to you?" the defence barrister suggested.
"I disagree," the friend replied.
The Crown alleges Lamarre-Condon killed Mr Baird "execution-style" at close range, acting out a plan borne of a jealous obsession, before shooting Mr Davies to eliminate a witness.
The trial continues on Tuesday.
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