GARDAI investigating the murder of the Dublin woman Ms Marilyn Rynn are examining a possible link with the disappearance of Ms Annie McCarrick, the American who went missing in 1993.
A man who had contact with Ms Rynn shortly before her death on December 22nd was also an acquaintance of Ms McCarrick prior to her disappearance.
The man is one of a number of people who have been questioned by gardai in the search for the killer of Ms Rynn, whose body was found on January 7th in Blanchardstown. She had been raped and strangled.
Gardai in the investigation are confident of making progress in the case. However, they say a number of question marks remain over Ms Rynn's last movements.
Ms Rynn (40), a civil servant, had been at a party in the Shieling Hotel in Raheny on the night of December 21st and took a taxi into the city centre at about 2 a.m.
She was recognised by friends at Eddie Rocket's City Diner in O'Connell Street shortly before 3 a.m. and is believed to have taken a NiteLink bus home to Blanchardstown.
The spot where her body was found is on waste ground between the bus stop and her home at Brookhaven Drive.
Gardai are not yet certain that she took the bus and, despite public appeals, the taxi driver who took her to the city centre has yet to come forward.
Gardai are examining the possibility that her attacker travelled on the same bus and followed her from the bus stop.
Although initially it was thought she might have been killed elsewhere and her body dumped on the waste ground, gardai are now confident she was killed at the spot where her body was found.
Ms McCarrick was aged 26 when she disappeared in March 1993. An acquaintance saw her in Ranelagh boarding a bus for Enniskerry, Co Wicklow.
The last sighting of her was by a doorman at Johnny Fox's pub in Glencullen.
Despite one of the largest missing person investigations conducted in the State, and a $150,000 reward offered by her father, nothing further is known about her fate.