One of the men arrested in connection with the murder of 17-year-old Keane Mulready-Woods has been released without charge.
A file will be prepared for the Director of Public Prosecutions.
A second man arrested as part of the investigation remains in custody at Drogheda Garda Station.
Keane was murdered in Drogheda on 12 January and his body dismembered.
Body parts recovered at two locations in Dublin were later confirmed to be those of the teenager.
Gardaí believe his murder is related to an ongoing feud between two Drogheda criminal gangs.