Julie Seed’s fiance, Chris Smith has revealed harrowing new details after her death and vows to fight for change in her honour

Julie Seed’s partner has revealed terrifying new details of the Plympton fatal stabbing attack, vowing to fight in her honour to change the state’s mental health system.

The grieving fiance of property manager Julie Seed, who was fatally stabbed on Wednesday has vowed to fight, in her honour, for change in the mental health system.

Chris Smith’s world shattered in a random instant when a man who had sought help didn’t get it.

Speaking exclusively to The Advertiser, Mr Smith has revealed the moments before his fiance of more than a year was brutally attacked and killed at her Plympton workplace.

“He walked into another business and there were too many people,” Mr Smith said.

“He said oh sorry, I’m at the wrong place, walked across the road and into her office.

Shaun Michaels Dunk, 30, has been charged with Ms Seed’s murder. Dunk left a free mental health service in the Adelaide CBD just hours before he walked into Ms Seed’s office in Lydia Street.

Shaun Michaels Dunk, 30, on Thursday faced the Adelaide Magistrates Court charged with one count each of murder and attempted murder. Picture: 7news

“How does this even happen?” Mr Smith’s mum Karen Need said.

Just when the couple of 4.5 years should be planning their wedding in earnest, there are now funeral arrangements at work in the days before Christmas.

Ms Seed’s two daughters, 12 and 17, were both excited about milestone birthdays in January, but those plans, too, have been abandoned.

“The girls aren’t wanting to celebrate,” Mr Smith said.

“They’re doing it rough. They’re trying to put on a brave face; there’s the up and down moments.”

The couple had built the foundations of a happy life together. Ms Seed with her dream job at the REAL Estate Agents Group, a wedding on the horizon and building their first home in Morphett Vale.

“They were really building their life together,” Mrs Need said.

Mr Smith said his fiance had found a home-away-from-home with her job, likening her colleagues to a family.

Stabbing at Plympton, flowers left at the door. Picture: Ben Clark

Julie 'Julez' Seed pictured with her fiance Chris Smith. Picture: Supplied by Chris Smith

“She loved her clients, they loved her and the people she worked with,” he said.

“It’s a boutique real estate, it’s not just a workplace - they were a family.

“All those girls are hurting.”

The couple had just started looking at venues for their wedding day - a big day that now will not come.

Instead, Mr Smith is determined to fight for change in Ms Seed’s honour.

“She didn’t deserve any of this, she wouldn’t hurt a fly,” he said.

“She would do anything for anyone, and had an infectious smile.

“She made friends with anyone and everyone, everywhere she went.”

Mr Smith said he struggled to understand how convicted criminals could be released from prison with support services and monitoring conditions, but not mental health patients who had expressed violent tendencies.

Youth offenders, he said, could be fitted with ankle trackers and monitored so authorities knew where they were “24-seven”.

“This needs to be made more public,” he said.

“I’m not the only one who wants answers, everyone in South Australia is asking the same thing. I want to see it change.

“With jail, they are released with a program and a pathway.

“But these people (with mental health issues) are thrown out to the wolves, as far as I am concerned.

Julie fiance Chris were set to start wedding plans. Picture: Supplied by Chris Smith

Chris will fight to make change within the metal health system. Picture: Supplied by Chris Smith

Mrs Need said too many Australian women were dying either at the hands of a man or by someone suffering mental health issues.

“The numbers are going up, not down,” she said. “It’s just not good enough. Nothing is helping.”

Mr Smith will set out on a crusade for change “when the dust settles”, and will look for public support to trigger change.

“Whether we go down the foundation side of things, and seek people to help and guide us, I just don’t know yet.”

Meanwhile, he will shoulder a mortgage alone while supporting the couple’s two girls facing their first Christmas without their mother.

He said the Gofundme fundraiser would help with more than just the funeral he began planning on Friday, and thanked the contributors.

“I’ve now got a mortgage to cover and two kids, and high interest rates,” he said.

“I don’t know how I’m going to do it.”