Justine Damond's father, John Ruszczyk, choked back tears as he spoke of his 40-year-old daughter, whom he described as being "ripped from our arms" when she was killed in Minneapolis, Minnesota, on 15 July.
"We should be walking down the street smiling and laughing", he said of his first visit to Minneapolis. And now each step on the footpath is so very painful.
'I can just feel her basically saying "why are you guys being so serious?",' friend Rosie McGowan said.
Lawyers for the killer police officer, Noor, 36, claim he felt he was being ambushed when he pulled the trigger and shot Ms Damond.
Ruszczyk said his daughter was killed by a bullet, that was sacked by an agent of the state, and he will continue to seek justice.
"We've lost the dearest of people and we're desperate for information", says Don Damond, the fiance of Justine Damond who was fatally shot by U.S. police.
Damond recounted how his fiancee would get up each morning and free write anything that came to mind, and how she was an inspiration to those around her.
He said: "I have enormous gratitude for being the one she chose".
"In Australia, they call it 'you're punching above your weight, ' alright?"
Ms Damond had called 911 to report a woman being raped close to her apartment block shortly before she was shot and killed.
Hundreds of people, many wearing heart-shaped stickers, attended the event.
A banner above the band shell at Lake Harriet reads, "Move from fear and survival to fascination and creation". An Australian flag stood on the sage next to a large color photo of Justine Damond and pink and white flowers.
The crowd also watched a performance from a didgeridoo player.
Mr Ruszczyk said it was "wrong on every level" that his daughter died the way she did.
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. "This information may more clearly define the actions of Officers Noor and Harrity both prior and post shooting".
At the memorial a man at the back of the crowd held a sign reading: "NOOR RESIGN NOW".