Guilty: Paul Mulvihill at the Darlinghurst Supreme Court. Photo: Edwina Pickles
It took less than two hours for a Supreme Court jury to seal Paul Darren Mulvihill's fate.
The 12 men and women had sat wading through scores of documents and pictures, and observing dozens of witnesses during Mulvihill's five-week trial.
But in the end, they clearly determined that the evidence was overwhelming: on the night of July 16, 2012, Mulvihill had taken the life of his former lover Rachelle Yeo by stabbing her in the neck and chest in her northern beaches home.
Closure: Victim Rachelle Yeo. Photo: Supplied
''Yes!'' one of Ms Yeo's family shouted as the verdict was delivered.
Mulvihill, a 46-year-old pharmaceutical salesman from the Gold Coast, hung his head, then shook it slowly. Moments later, the tears from the large contingent of Ms Yeo's family began to flow.
The young woman's parents, Roger and Kathy, had attended every day of the five-week trial.
Mulvihill's wife, Theresa, who gave evidence. Photo: Edwina Pickles
They sat patiently as Crown prosecutor Maria Cinque explained to the jury how Ms Yeo and Mulvihill had met while working at pharmaceutical company Sanofi Aventis and, despite the fact that both were involved in long-term relationships, began an affair that lasted 18 months.
Ms Cinque had described how, after Mulvihill's wife found out about the affair, Ms Yeo told her lover their relationship had to end because ''it's best for both of us''.
Witnesses then spoke of Mulvihill's inability to accept that things were over, and his growing hurt, resentment and fury that Ms Yeo refused to come around to his point of view.
Mulvihill's wife, Theresa, told the jury that one night before Ms Yeo's death, her husband had put a pillow over her face and said, ''It's not you, it's her.''
Ms Cinque told the jury that he stalked Ms Yeo at work and on Facebook, discovered her new address in Curl Curl, and then went to her home with a white chain and a black hoodie.
''He had gone to her place that evening … waited outside for her, followed her up the stairs to her unit, without her knowing, followed her inside the unit and then attacked her,'' she said.
Roger and Kathy Yeo kept their composure as Mulvihill gave evidence, telling the jury how, heartbroken about the end of the affair, he had gone to the apartment that night simply to talk but suddenly found himself being attacked with a large kitchen knife.
In the ensuing struggle, he said, Ms Yeo was accidentally stabbed twice, at which point he fled the apartment believing the young woman was still alive.
Finally, with the jury's unanimous and rapid rejection of Mulvihill's version, Roger and Kathy Yeo could let the tears flow.
''There are no winners in cases like this,'' Mr Yeo said. ''Unfortunately there are a lot of them - over 70 women are killed every year by their partners and ex-partners, and our daughter was one of them.
''I want to thank the jury for their focus and hard work over the last five weeks. Justice has been well served today.''