Sitting in the grounds of the Supreme Court where her sister's violent husband was jailed for murder, Kelly wipes away tears as she remembers Andrea Pickett's beauty, vulnerability and the system that failed her.
Mrs Pickett, 39, was stabbed 17 times in January 2009 by Kenneth Charles Pickett, who had repeatedly breached a violence restraining order.
Kelly, who did not wish to give her surname, said women did not feel protected by VROs because "they know that the men think nothing of restraining orders".
Pickett stalked his estranged wife over the course of a weekend.
He threatened to kill her on the Saturday night and she fled to a different house the next day but Pickett followed her. On the Monday, he murdered her on the front lawn of the North Beach house in front of one of their 13 children.
Kelly said she believed her sister might still be alive if electronic monitoring of Pickett had alerted her to his location. "The police didn't know where he was, but he knew where she was," she said.
"Andrea was beautiful - she had a really good heart. There has to be changes to the system. These things aren't working."
Aboriginal Family Law Services WA chief executive Hannah McGlade said she supported electronic monitoring of domestic violence perpetrators. But rather than just putting more men in jail, any increased focus on domestic violence should look at preventing it.
"An Aboriginal woman is approximately 45 times more likely to be hospitalised from family and domestic violence," Ms McGlade said.
A coronial inquest will examine in June whether government agencies did enough to help Mrs Pickett.