The 31-year-old former senior constable has pleaded not guilty to murdering his ex-partner Jesse Baird and Mr Baird's new lover Luke Davies in February 2024.
Lamarre-Condon says both men were killed in self-defence in Mr Baird's Sydney terrace and his multi-day efforts to dispose of their bodies showed his panic rather than intent to kill.
During the NSW Supreme Court trial's fifth week, jurors have been shown extensive CCTV footage of the two days after Mr Baird and Mr Davies were killed.
The recordings show Lamarre-Condon acting solo and with multiple friends as he went about disposing the two men's bodies.
On February 20, a disguised figure alleged to be the 31-year-old can be seen walking towards Mr Baird's house carrying a bucket.
Later, Lamarre-Condon is seen making multiple purchases at Bunnings Alexandria, including a power drill and hi-vis clothing.
That evening, he picked up a friend, yet to give evidence at trial, and went with him to dinner at a Sushi Train restaurant in Cronulla.
The Crown alleges the friend seen with Lamarre-Condon at Sushi Train is the same person seen in CCTV buying a surfboard bag with the officer three days earlier.
When driving the friend back to his house, the accused's Tesla can be seen stopping at Club Cronulla.
A man, alleged to be the friend, gets out of the passenger side of the car and inspects a skip bin in the car park.
Later that night, the same camera at the bowling club captures a white van pulling into the car park.
A figure lifts the bin lids and dumps items in it.
The bloodied belongings of Mr Baird and Mr Davies were found in the bin by a groundskeeper at the club the following day.
The following day, Lamarre-Condon spent much of the day driving around a different friend, known by the pseudonym Elizabeth Kennedy.
Ms Kennedy was picked up by the accused in a white van on February 21, two days after the killings, but she did not initially notice anything out of the ordinary.
"I could see a blue tarp in the back ... it was just flat," she told the court.
"It had a fresh lemony smell ... like you'd expect from a rental car."
But Ms Kennedy said she began to notice things were off during the two-hour drive down to the NSW Southern Highlands.
"It got really cold ... the windows remained down ... the air-conditioning was on full (the whole time)," she said.
"He wouldn't really let me get a word in ... every time I asked how much longer he would change the subject."
Some of those subjects stuck out to Ms Kennedy, who said Lamarre-Condon was cryptic throughout the return trip.
After nearly hitting a bird while driving, she recalled him saying: "You know I'd never hurt an animal, right?"
When they reached Goulburn, Lamarre-Condon made Ms Kennedy buy him an angle grinder and a padlock from Bunnings, she said.Â
The Crown alleges the angle grinder was later used by Lamarre-Condon to cut a lock on a gate at Cella Farm at Bungonia.
Ms Kennedy was allegedly left by the gate while Lamarre-Condon drove in and attempted to dispose of the men's bodies in a dam using gym weights and quick-set concrete, the Crown claims.
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