Irene White was stabbed to death at her home in Dundalk. She suffered multiple wounds to her back and chest.
The prime suspect in the murder, a man aged between 30 and 40, was seen running from the house at Ice House Hill Park on the morning of the murder, it emerged yesterday.
He ran out of the house, leaving his victim fatally injured on the kitchen floor, across a park and into a car.
The €10,000 reward is being offered by Crimestoppers for specific information that would lead to the killer being identified.
Two similar rewards have been offered in the last month for information about the murder of the still unidentified man whose body was discovered in Dublin’s Royal Canal and an elderly man left for dead in his home in Co Mayo seven years ago.
The appeal for information about the murder of Mrs White is aimed not just at people from Dundalk but also nationwide as the attacker may have been from outside the area.
Detective Inspector Jim Sheridan, one of those leading the investigation, said: “This was a particularly horrific murder. This is a mother of three children who received multiple stab wounds in the kitchen of her own home.”
Investigating gardaí have now established that a man ran from the house at approximately 10.15am on April 6, the morning Mrs White was found dead.
The man ran through Ice House Hill Park on to O’Hanlon Park and then got in to a dark coloured car left parked in the street. He is described as being aged between 30 and 40 and was wearing jeans, a dark jacket and a peaked cap.
The body was discovered by the victim’s mother, Maureen McBride, just over two hours later.
Mrs McBride, who lived in a mobile home at the bottom of the garden, stumbled across the body after making her way to the house for breakfast.
Detectives do not believe robbery was the motive for the murder and have not ruled out the possibility the victim knew her attacker.
A murder weapon has not been found though a number of knives discovered by gardaí are being forensically tested to check whether one of them was used to kill Mrs White.
Anyone with information is asked to call the confidential Crimestoppers line on 1800 25 00 25 or the gardaí in Dundalk on 042 9335577.
The murdered 43-year-old woman was the mother of one girl, Jennifer, 17, and two boys, Dairine, six, and Damhan, four. She was separated from her husband Alan.
A week after the murder, Mr White was blocked from selling the family home after Mrs McBride and her granddaughter Jennifer were granted an injunction by the High Court.