(CBS) -- Minnesota investigators say a loud noise startled officer Mohamed Noor's partner just before Noor shot and killed Justine Damond, a well-liked yoga instructor, and life coach.
Justine Ruszczyk, fatally shot by a Minneapolis Police Officer, Photo Date: 11/3/15 Photo: Justine Ruszczyk
According to the Minnesota Bureau of Criminal Apprehension, Damond called 911 about a possible assault Saturday night.
Noor and officer Matthew Harrity drove down an alley behind Damond's house with their squad car lights off searching for a suspect. Harrity told investigators they were startled by a loud bang. Immediately after, Damond approached the driver side of the cruiser. Officer Noor shot Damond from the front passenger seat.
Activist Suud Olat says Minneapolis's Somali community admired Noor when he joined the police department in 2015.
But since joining, Noor has had three complaints filed against him. Two are pending, the third was dismissed without discipline. And last month, Noor and two other officers were sued for false imprisonment, assault, battery and negligence for their alleged conduct during a welfare check.
Damond's family here in Minneapolis, and in her native Australia have begged for information surrounding her death.
Australian Prime Minister, Malcolm Turnbull is now joining their fight.
Investigators now want to talk to any potential witnesses, including a man on his bicycle who stopped at the scene while officers attended to Damond.
We reached out to officer Noor's attorney about this new information, but have not heard back.