A man arrested as part of an investigation into the murder of Keane Mulready-Woods in Co Louth has been released without charge.
The 17-year-old boy was killed in Drogheda in January last year.
A man in his late 20s was arrested in Dublin on Thursday morning and was being questioned at a Garda station in Louth.
A file will be prepared for the Director of Public Prosecutions (DPP).
