Gardaí investigating the disappearances of a number of women in the 1990s are trying to piece together the movements of a convicted murderer and rapist.
Earlier, a court in Belfast ruled that the convictions of 61-year-old Robert Howard, from Wolfhill in Co Laois, could be reported for the first time.
The convictions include the murder of a 14-year-old girl in London four years ago.
Hannah Williams disappeared in March 2001. Her body was found 11 months later by workmen digging the channel tunnel in Kent, 20 miles from her home.
The teenager had been strangled by Howard, who had befriended her some weeks before her disappearance. He was convicted of her murder in England in 2003.
Robert Howard was previously jailed for ten years in 1974 for raping a woman after breaking into her home in Co Cork.
He left Mountjoy Jail in 1981 and over the following two decades travelled extensively, living in a number of locations in Ireland including Ranelagh, Coolock, Clondalkin, Monaghan, Letterkenny, Wexford, Newry and Castlederg.
Last June, Howard was found not guilty of murdering 15-year-old Co Tyrone schoolgirl Arlene Arkinson who disappeared in August 1994 and whose body has never been found.
Arlene disappeared after travelling to a disco in Bundoran and accepting a lift home from Howard.
For legal reasons, the jury in the trial at Belfast Crown Court was not told of Howard's previous convictions.
Howard's criminal career began at the age of 13 when he was convicted of burglary. His first sexual crime was committed aged 19 in 1965, when he attempted to abuse a six-year-old child in London.
In 1969, he was convicted of attempting to rape a woman in Durham after breaking into her home.
Upon release from prison in England he returned to Ireland, and moved to Cork where he lived under an alias, until he was arrested and convicted of raping a woman after breaking into her home.
