Don Damond gets a hug from a supporter shortly after he arrived for a memorial service.
Ruszczyk spoke at the memorial which took place at performance venue in Lake Harriet, southwest Minneapolis.
Damond had moved to the area to be with her fiance Don Damond, who said Friday that it "felt like a privilege to love Justine".
At the memorial a man at the back of the crowd held a sign reading: "NOOR RESIGN NOW". He and Justine Ruszczyk - who'd already begun using his last name socially and professionally - were due to get married Thursday.
Damond was engaged to be married in August.
Justine Damond, left, pictured with her fiance Don and Don's son Zach.
Police are investigating the shooting but the officer who fired will not talk to them, and the ABC understands even after a month, no significant police findings about what happened have been passed on.
The search warrant shows that an agent with the Minnesota Bureau of Criminal Apprehension requested permission to download data from the iPhones issued by the Minneapolis Police Department.
Mr Noor's colleague Matthew Harrity told investigators he was startled by a noise just before Ms Damond approached their police SUV. Noor was in the passenger seat and shot Damond through the open driver-side window.
He has refused to be interviewed by investigators and can not be compelled to do so.
Today they will gather for a memorial instead at the Lake Harriet Bandshell near her home in Minneapolis. "And that is who Justine was", Damond said.
It will end with a silent and solemn walk around Lake Harriet.