Cheryl Ardler's devastated family have pleaded, at an emotional press conference on Thursday morning, for her killer to surrender.

"Our family is so devastated to know we will never see or speak to Cheryl again. Our hearts are broken, this has changed our lives forever," said her sister Josephine, speaking on behalf of her sisters Tracey and Margaret and her mother Irene.

"Cheryl was a beautiful out-and-proud Aboriginal woman who loved life. Our family pleads with the public today, especially the Aboriginal community, to come forward with any information you may have in relation to our sister."