Anne Delcassian, whose sister Irene White was killed in a frenzied attack three years ago this weekend, said the net is closing on her killers.
She said a circle of people were involved in the killing on April 6, 2005, and maintains gardaí are building a catalogue of evidence. Despite two arrests, no one has been charged in connection with her murder.
“They have tried to cover themselves and think they have got away with it, but they have not,” said Ms Delcassian.
“I’m waiting for their time to come and when I finally sit in the court in Dublin I will have a great feeling looking at these people,” she added.
Last year, more than 200 people gathered for the emotional memorial outside Ms White’s home on Demesne Road. Heartbroken families stood in solidarity at Ice House to mark the second anniversary of the 43-year-old’s death and pay tribute to the scores of women killed in violent attacks in the previous decade.
Among those present were the parents and siblings of Rachel O’Reilly and Siobhan Kearney, who have since seen their murderers jailed for life.
Ms Delcassian said those convictions give her hope that her sister’s killer will be caught.
“I feel like the gardaí are working on these cases one by one and are getting them ticked off. I know Irene’s time will come.
“The gardaí knew Irene before she was murdered. She had been to the station about threats to her life.
“A circle of people were involved in Irene’s murder. The gardaí are aware of who they are looking for and have no doubt that they will get those responsible.
“A file is being prepared for the Director of Public Prosecutions.”
Ms White’s body was discovered by her elderly mother Maureen McBride in a pool of blood on the kitchen floor.
Six months later, in October 2005, Ms McBride died on what would have been her daughter’s 44th birthday.
Separated from her husband Alan, the loving mother had taken her three children to school just hours before she was killed.
Ms Delcassian, who now lives in Manchester, maintains her mother died of a broken heart, with the murderer responsible for both their deaths.
The 45-year-old returns to Ireland monthly.