Family members hope rewards will help solve two New Zealand cold cases which have baffled Australian police for three decades.
Police have offered rewards of more than $100,000 for information which might help them close the cases.
The two New Zealand women, Linda Davie and Marion Sanford,
disappeared within months of each other in Sydney in 1980.
Their families still don't know what happened to them but are hoping the new rewards might help change that.
Until a few days ago, Edgecumbe farmer Nigel Davie had almost given up ever knowing what happened to his sister Linda.
Now Nigel Davie is helping Sydney police in one last ditch effort to find out what happened.
He has spent much time thinking about his missing sister.
"We miss her quite a bit," he says.
Linda Davie disappeared in Sydney 30 years ago this month.
The 22-year-old visited her partner in hospital, then apparently sent him a note saying she was going away for a few days.
After leaving the hospital, Linda Davie returned to her house in Bridge End Street in North Sydney and it's not knowing what happened next that has haunted her family for the past 30 years.
"It will be good to get it solved, to know what happened and bring someone to justice, but just closure for what happened," says Nigel Davie.
One media report links the case to notorious serial killer Ivan Milat who was convicted of seven murders between 1978 and 1989.
"At this point that's just speculation," says Rob George of New South Wales Police.
The Kiwi's disappearance is linked to two other missing women cases.
One of them, another New Zealander, Marion Sanford, also disappeared in Sydney 30 years ago.
It's understood Sanford had links to convicted drug syndicate boss Terry Clarke.
Sanford also left a note, to her brother, saying she too was going away.
Now New South Wales police are offering $120,000 rewards for information leading to a conviction in all three cases.
"There is going to be one or two people that have information that can tell us exactly what happened to Linda and Marion," says George.
Just a tiny snippet of information could answer one burning question for so many people.