The grave of a Corowa teenager raped and killed nearly half a century ago has never carried the words "rest in peace".
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The long suffering family of Bronwynne Richardson, whose body was found at Horseshoe Lagoon on October 14, 1973, say she will never be at peace until her killer is found.
The late 17-year-old's father, Stan, died three days after the 43rd anniversary of his daughter's death, never knowing who was responsible.
His grave, and Bronwynne's brother's grave, are also void of the epitaph.
The family hopes a $1 million reward announced on Friday will finally solve the case following multiple false starts over the past 46 years, and allow her to finally be at peace.
"We're not going to stop," her sister Fiona Hume told The Border Mail.
"It doesn't end with the death of my father, it won't end with the death of my mother.
"We'll always be searching for the person, or persons, who committed this offence.
"We will continue to plea for someone to come forward with information."
She had last been seen getting dragged into a 1961 FB Holden station wagon which was green with white roof, on Smollett Street, two days before her body was found at the lagoon.
Two inquests and multiple investigations haven't led to a conviction.
Colin Michael Newey, a distant cousin, was arrested and charged with her rape and murder in July 2015 but the charges were dropped the following year in a decision that left her family devastated.
Three men were charged following an investigation in 1990 but were never convicted.
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Ms Hume said it was disappointing charges were dropped against Newey, but said the family had never given up hope even with the passage of time.
Her mother Noelle, 85, still wakes up screaming every night and Ms Hume said she thinks of "Bronnie" multiple times each day.
She is urging anyone with information, no matter how small, to speak out.
"I'd say don't think about it, do it," Ms Hume said.
"It's something that can work out positively for them.
"If the person is found guilty of murdering Bronnie, then they will get the reward for doing the right thing, and we'll get justice.
"We will be able to put "rest in peace"on her grave and on dad's.
"We need the people who know to come forward."
Ms Richardson's parents made the decision to leave the epitaph off their daughter's grave at Carlyle Cemetery.
It will be added when the killer, or killers, are brought to justice.
"We grieve daily for Bronnie and the life she never got to live," Ms Hume said.
"Our father Stan, he died without the peace that knowing who murdered his precious girl would have given him."
Homicide Squad Detective Superintendent Scott Cook said detectives would investigate every line of enquiry under Strike Force Kulaman II, which follows the first Kulaman investigation launched in 2008.
"There is someone out there who knows who is responsible for her death and we're hoping this reward increase may prompt them to get in touch with police," Superintendent Cook said.
The $1 million reward is available for information leading to a conviction of those responsible for her death.
Anyone with information can call Crime Stoppers on 1800 333 000.
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