Detectives were tonight preparing to send a case file to state lawyers regarding the murder of a mother-of-four found dead in the Grand Canal.
Yvonne O’Shea died after she went into the water from a narrow towpath road in Co Laois on the night of Saturday, November 22, 2008.
Her four sons were in a broken down car beside the canal between Vicarstown and Athy when she died.
A 41-year-old man questioned for 24 hours over the killing was today released without charge.
Gardaí said a file will be prepared for the Director of Public Prosecutions.
Initially Ms O’Shea’s death was treated as a drowning but within days detectives believed she had been murdered.
On the day of the incident, local gardaí were quickly on the scene and officers entered the canal in an attempt to save Ms O’Shea.
It was reported the car in which Ms O’Shea had been travelling with her husband and their four children had broken down on the narrow towpath road beside the canal.