Felix Cacchione, director of SiRT, says that many details of the investigation aren't available yet.
"We will make a comment and report once the investigation is completed, but until then I can't confirm or deny anything," he tells NEWS 95.7's The Rick Howe Show on Tuesday.
The original incident occurred early Saturday morning, when a police officer fired his weapon at a suspect driving an allegedly stolen vehicle on Willow St. in Truro.
Cacchione confirms that the officer was struck by the suspect's vehicle and landed on top of it.
"He was struck by the vehicle, landed on the hood, held on, and the car sped away at high speeds," Cacchione says.
Although witnesses say they heard multiple shots fired, Cacchione can only confirm that the service weapon was fired.
"At some point the officer discharged his firearm and was thrown from the vehicle," he adds.
The driver of the vehicle died at the scene, and the RCMP officer was taken to hospital.
On Monday, the officer involved in the incident awoke from a brief medically induced coma.
But Cacchione says SiRT has not spoken to the officer yet, who is still recovering from a head injury.
"We will talk to him at some point, but I can't say when," Cacchione told the Canadian Press yesterday.
So far, investigators have interviewed three witnesses to the shooting, including another RCMP officer and two members of the public, Cacchione said. SiRT also plans to examine video from local businesses in the vicinity of the incident.
Cacchione also says the officer who was involved in the incident isn't obligated to provide a statement or to disclose notes or reports.
"It's difficult to give you a timeline for when the investigation will be completed. We're awaiting the autopsy or the medical examiners report, as well as the forensic identification reports," Cacchione says.
When SiRT does wrap up their investigation, the report will be released to the public via their website.
"Our investigation is to determine whether the actions of the officer were justified. If they were not justified, then our responsibility is to lay a criminal charge, and if they were justified we will make the justification known."
With files from the Canadian Press