The court has heard that police discovered a hole in Baird's bedroom door in July this year, more than two years after the alleged murders. The Crown alleges Lamarre-Condon shot Davies through the door while Davies tried to call Triple Zero for help, and that a "very muffled" gunshot can be heard on that call.
Police ballistics expert Lucas Van Der Walt gave evidence on Wednesday that officers removed the door from Baird's former share house and fired a test shot into it in July. A video of that test shot, including a side-by-side comparison of the original hole and the test hole, was played to the jury.
Van Der Walt said both holes measured approximately 10 millimetres in diameter, with a "very similar spread pattern of the propellant particles impacting with the paint and the wood in the door". He said the original shot would have been discharged at a distance of between five and ten centimetres from the door.
Prosecutors allege the original hole was not visible in 2024 because Lamarre-Condon covered it with a stick-on hook on the inside of the door and a felt pad on the outside. NSW Police Senior Sergeant Bronwyn Lansley, the lead forensic investigator at the property, has previously told the court she observed that "repairs had been made both to external and internal sides of the door", where she believed the pad and hook had been located.
The former NSW police officer has pleaded not guilty to both murder charges.