The police officer who shot dead the Australian woman in a Minneapolis was reportedly in the passenger seat when he fired multiple times across his partner.
AAP reports the officer, identified as Mohamed Noor, 31, has been on the force a little more than two years.
He is also the first Somali-American police officer in his precinct.
Justine Damond, formerly Justine Ruszczyk, was reportedly struck more than once by the police fire, killing her at the scene despite being administered CPR by the officers.
A chilling audio recording has emerged of the moments after Damond was shot.
The officers are heard talking with their dispatcher over the radio, calling for back-up and their attempts to perform CPR.
“Shots fired … we have one down,” one of the officers says.
Damond had called the police just before midnight on Saturday after hearing a possible sexual assault taking place in an alley near her home.
Damond, 40, was approaching the police car in her pyjamas when she was shot.
She was a meditation and life coach teacher, due to marry her fiance next month.
She had lived in the US for only three years, and often spoken of her problems with America’s gun laws.
Her death is being investigated by the Minnesota Bureau of Criminal Apprehension.
According to a report by the Daily Mail, Noor has had three complaints made against him since he joined the Minneapolis Police in March 2015.