Ten years after Operation Trace was established to examine the cases of six women who disappeared in Leinster in the 1990s, new information is continuing to be examined by gardaí.
A €10,000 reward has been offered by the Crimestoppers Trust for information on the disappearance of Jo Jo Dullard in 1995.
A computer age-ehanced image of Ms Dullard has been released showing how she might look today aged 34.
Detective Superintendent John McMahon told RTÉ News that every available resource is being deployed to try and solve the cases.
However, despite following up over 10,000 lines of enquiry, the six women have not been found.
Ms Dullard's sister Kathleen Bergin has appealed to people with information to find the courage to make the call.
‘Maybe there's someone who has been attacked themselves and has never told anyone. Maybe the same person who attacked you is responsible for Jo Jo's disappearance. Please contact Crimestoppers’, she said.
The five other cases under investigation by Operation Trace are those of US national Annie McCarrick who vanished in 1993. Tullamore woman Fiona Pender was seven months pregnant when she disappeared in August 1996.
18-year-old Ciara Breen was last seen at her home in Dundalk in February, 1997. Wexford woman Fiona Sinnott (20) and 18-year-old Deirdre Jacob from Kildare both went missing in 1998.
Det Supt McMahon has pledged that gardaí will continue to follow up every conceivable lead.
‘Even now, ten years after this Unit was set up, people are still phoning in nominating potential suspects for the disappearances. There are people who for whatever reason couldn't pass on information back in the 1990s and are now able to do so.
‘We would appeal to all people with information on these cases to find a way to pass on what they know, so that we can bring closure for the families’, he said.
The Crimestoppers number is 1800 250025.