Gardaí investigating the murder of housewife Rachel O'Reilly have begun a nationwide hunt for a possible key witness.
The mother of two (30) was beaten to death with a blunt instrument at her home in Baldarragh in Dublin, on October 4th last year.
Gardaí believe a driver of a Fiat Marea car reported to be in the area on the day of the murder may have seen something that would aid the investigation.
Detectives across the country have been visiting the owners of Fiat Marea cars in the last month in an attempt to locate the driver.
Although several people have been arrested for questioning, no one has been charged with the murder of Ms O'Reilly.
Her body was exhumed last March at Balgriffin Cemetery in north Dublin to allow the Garda Technical Bureau carry out a graveside forensic examination.
The alarm was raised last October when Ms O'Reilly failed to collect one of her two children from a creche. Her mother went to the house and found her daughter dead in the bedroom.
A postmortem revealed she had died from head wounds inflicted with a blunt instrument.
Her husband, Joe O'Reilly appeared with the family on the Late Late Showto appeal for information on the murder.